Isoflavonoid compounds and methods for the treatment of cancer

ABSTRACT

Provided herein is a pharmaceutical composition comprising at least one isoflavonoid. Also provided herein are methods of treating cancer, sensitizing cancer cells, and inducing apoptosis in cancer cells by administering such compositions.

CROSS-REFERENCE

This application is a continuation of U.S. patent application Ser. No.16/129,589, filed Sep. 12, 2018, which is a continuation of U.S. patentapplication Ser. No. 15/456,182, filed Mar. 10, 2017, now U.S. Pat. No.10,105,346, issued Oct. 23, 2018, which is a continuation of U.S. patentapplication Ser. No. 13/881,609, filed Apr. 16, 2014, now U.S. Pat. No.9,663,484, issued May 30, 2017, which was filed pursuant to 35 U.S.C. §371 as a United States National Phase Application of InternationalApplication Ser. No. PCT/US2011/058815, filed Nov. 1, 2011, which claimsthe benefit of priority to U.S. Provisional Application No. 61/408,972,filed Nov. 1, 2010, all of which are incorporated herein by reference intheir entirety.

BACKGROUND OF THE INVENTION

Cancer is the leading cause of death worldwide.

SUMMARY OF THE INVENTION

Provided herein, in some embodiments, is a pharmaceutical compositioncomprising a compound of formula II or a pharmaceutically acceptablesalt thereof:

wherein

-   -   R₁ is hydroxy, alkoxy, haloalkyl, or halo;    -   R₂ is hydroxy or alkoxy;    -   R₃ is alkyl, halo, or haloalkyl;    -   R₄, R₅, and R₆ are independently hydrogen, hydroxy, alkoxy,        halo, haloalkyl, or alkyl; and    -   R₇ is alkyl or hydrogen.

In some embodiments, the pharmaceutical composition comprises a compound(i.e., isoflavonoid derivative) of formula II, wherein R₁ is hydroxy ormethoxy. In other embodiments, R₁ is hydroxy. In other embodiments, R₁is methoxy. In other embodiments, R₁ is halo. In other embodiments, R₁is fluoro. In other embodiments, R₂ is hydroxy. In other embodiments, R₃is methyl. In other embodiments, R₃ is fluoro. In other embodiments, R₇is methyl.

Also provided herein, in some embodiments, is a pharmaceuticalcomposition comprising a compound of formula III or a pharmaceuticallyacceptable salt thereof:

wherein

-   -   R₂ is hydroxy or alkoxy;    -   R₃, R₄, R₅, and R₆ are independently hydrogen, hydroxy, alkoxy,        halo, haloalkyl or alkyl; and    -   R₇ is alkyl.

In some embodiments, the pharmaceutical composition comprises a compound(i.e., isoflavonoid derivative) of formula III, wherein R₂ is hydroxy.In other embodiments, R₃ is hydrogen or alkyl. In specific embodiments,R₃ is hydrogen. In specific embodiments, R₃ is alkyl. In otherembodiments, R₃ is C₁₋₆alkyl. In other embodiments, R₃ is C₁₋₃alkyl. Infurther or additional embodiments, R₃ is methyl. In other embodiments,R₃ is haloalkyl. In other embodiments, R₇ is methyl.

Some embodiments provided herein describe a pharmaceutical compositioncomprising a compound of formula IV or a pharmaceutically acceptablesalt thereof:

wherein

-   -   R₈ is hydrogen or alkyl.

In some embodiments, the pharmaceutical composition comprises a compound(i.e., isoflavonoid derivative) of formula IV, wherein R₈ is hydrogen.In other embodiments, R₈ is C₁₋₆alkyl. In other embodiments, R₈ isC₁₋₃alkyl. In other embodiments, R₈ is methyl. In other embodiments, R₈is ethyl. In other embodiments, R₈ is propyl. In other embodiments, R₈is isopropyl.

In some embodiments, the composition comprising a compound of formulaII, III or IV further comprises an anti-cancer agent selected from thegroup consisting of cisplatin, carboplatin, paclitaxel, gemcitabine,doxorubicin, epirubicin, cyclophosphamide, capecitabine, 5-fluorouracil,vinorelbine, trastuzumab or bevacizumab. In specific embodiments, thepharmaceutical composition further comprises carboplatin.

Also described herein is a compound of formula II, III, or IV for use ininducing apoptosis in a cancer cell. In some embodiments, the type ofcancer cell apoptosed, or otherwise targeted according to any methoddescribed herein, is selected from the group consisting of bladdercancer, breast cancer, colon cancer, rectal cancer, endometrial cancer,kidney cancer, leukemia, lung cancer, melanoma, non-Hodgkin lymphoma,ovarian cancer, pancreatic cancer, prostate cancer, thyroid cancer andcancers of the brain. In certain embodiments, the type of cancer cell ishuman breast, prostate, ovarian, pancreatic, or cervical cancer. Incertain specific embodiments, the type of cancer cell is human breastcancer or ovarian cancer.

In some embodiments, any method described herein further comprisesadministering, e.g., to a targeted cell, a chemotherapeutic agent. Inspecific embodiments, the chemotherapeutic agent is selected from thegroup consisting of cisplatin, carboplatin, paclitaxel, gemcitabine ordoxorubicin.

In certain embodiments, a cancer cell apoptosed, or otherwise targetedaccording to any method described herein, is present in an individual.In specific embodiments, the individual is in need of cancer therapy. Incertain specific embodiments, the composition is administered to theindividual intravenously.

Also described herein is a compound of formula II, III, or IV for use inthe treatment of cancer in an individual in need of cancer therapy.

Some embodiments provided herein describe a compound of formula II, III,or IV for use in increasing, inducing, or restoring sensitivity of acancer cell to a chemotherapeutic agent, anti-cancer agent or radiationtherapy. In some embodiments, the cancer cell has lost sensitivity to achemotherapeutic agent, anti-cancer agent or radiation therapy.

In some embodiments, the type of cancer cell or cancer sensitizedaccording to a method described herein is bladder cancer, breast cancer,colon cancer, rectal cancer, endometrial cancer, kidney cancer,leukemia, lung cancer, melanoma, non-Hodgkin lymphoma, ovarian cancer,pancreatic cancer, prostate cancer, thyroid cancer or a cancer of thebrain. In certain embodiments, the type of cancer cell is human breast,prostate, ovarian, pancreatic, or cervical cancer. In certain specificembodiments, the type of cancer cell is human breast cancer or ovariancancer. In more specific embodiments, the cancer cell is a human breastcancer cell. In other specific embodiments, the cancer cell is a humanovarian cancer cell.

In certain embodiments, the cancer cell sensitized according to a methoddescribed herein is present in an individual. In specific embodiments,the individual is in need of cancer therapy. In certain specificembodiments, the composition is administered to the individualintravenously. In some embodiments, the cancer cell has lost sensitivityto a chemotherapeutic agent or radiation therapy.

Some embodiments provided herein describe a kit comprising a compound offormula II, III, or IV. In some embodiments, the kit provided herein hasa sealable, plastic infusion bag. In some embodiments, the kit furthercomprises intravenous tubing. In other embodiments, the kit furthercomprises a needle.

DETAILED DESCRIPTION OF THE INVENTION

While preferred embodiments of the present invention have been shown anddescribed herein, it will be obvious to those skilled in the art thatsuch embodiments are provided by way of example only. Numerousvariations, changes, and substitutions will now occur to those skilledin the art without departing from the invention. It should be understoodthat various alternatives to the embodiments of the invention describedherein may be employed in practicing the invention. It is intended thatthe following claims define the scope of the invention and that methodsand structures within the scope of these claims and their equivalents becovered thereby.

There is a continuing need to develop and provide effective therapiesfor the treatment of cancer. Described herein is a composition that hasanti-cancer activity. The composition described herein comprisesisoflavonoid derivatives (substituted diaryl chroman derivatives). Alsoprovided herein are methods to induce apoptosis in a cancer cell,methods to treat cancer in individuals in need of cancer therapy, andmethods to increase sensitivity of a cancer cell to a chemotherapeuticagent and/or radiation therapy (or to sensitize an individual to aparticular chemotherapy).

Certain Definitions

Unless otherwise noted, terminology used herein should be given itsnormal meaning as understood by one of skill in the art.

The term “alkyl” as used herein, alone or in combination, refers to anoptionally substituted straight-chain, or optionally substitutedbranched-chain saturated hydrocarbon monoradical having from one toabout ten carbon atoms, more preferably one to six carbon atoms.Examples include, but are not limited to methyl, ethyl, n-propyl,isopropyl, 2-methyl-1-propyl, 2-methyl-2-propyl, 2-methyl-1-butyl,3-methyl-1-butyl, 2-methyl-3-butyl, 2,2-dimethyl-1-propyl,2-methyl-1-pentyl, 3-methyl-1-pentyl, 4-methyl-1-pentyl,2-methyl-2-pentyl, 3-methyl-2-pentyl, 4-methyl-2-pentyl,2,2-dimethyl-1-butyl, 3,3-dimethyl-1-butyl, 2-ethyl-1-butyl, n-butyl,isobutyl, sec-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, tert-amyland hexyl, and longer alkyl groups, such as heptyl, octyl and the like.Whenever it appears herein, a numerical range such as “C₁-C₆ alkyl” or“C₁₋₆ alkyl”, means that the alkyl group may consist of 1 carbon atom, 2carbon atoms, 3 carbon atoms, 4 carbon atoms, 5 carbon atoms or 6 carbonatoms, although the present definition also covers the occurrence of theterm “alkyl” where no numerical range is designated.

The terms “C₁-C₃-alkyl” and “C₁-C₆-alkyl” as used herein refer tosaturated, straight- or branched-chain hydrocarbon radicals derived froma hydrocarbon moiety containing between one and three, one and six, andone and twelve carbon atoms, respectively, by removal of a singlehydrogen atom. Examples of C₁-C₃-alkyl radicals include methyl, ethyl,propyl and isopropyl. Examples of C₁-C₆-alkyl radicals include, but notlimited to, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl,neopentyl and n-hexyl.

The term “cycloalkyl” as used herein refers to a monovalent groupderived from a monocyclic or bicyclic saturated carbocyclic ringcompound containing between three and twenty carbon atoms by removal ofa single hydrogen atom.

The term “C₃-C₆ cycloalkyl” denoted a monovalent group derived from amonocyclic or bicyclic saturated carbocyclic ring compound by removal ofa single hydrogen atom. Examples include cyclopropyl, cyclobutyl,cyclopentyl, cyclohexyl.

The alkyl group or cycloalkyl group may optionally be substituted by oneor more of fluorine, chlorine, bromine, iodine, carboxyl, C₁₋₄alkoxycarbonyl, C₁₋₄ alkylaminocarbonyl, di-(C₁₋₄ alkyl)-aminocarbonyl,hydroxyl, C₁₋₄ alkoxy, formyloxy, C₁₋₄ alkylcarbonyloxy, C₁₋₄ alkylthio,C₃₋₆ cycloalkyl or phenyl.

The term “alkoxy” as used herein, alone or in combination, refers to analkyl ether radical, —O-alkyl, including the groups —O-aliphatic and—O-carbocyclyl, wherein the alkyl, aliphatic and carbocyclyl groups maybe optionally substituted, and wherein the terms alkyl, aliphatic andcarbocyclyl are as defined herein. Non-limiting examples of alkoxyradicals include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy,iso-butoxy, sec-butoxy, tert-butoxy and the like.

The terms “C₁-C₃-alkoxy”, “C₁-C₆-alkoxy” as used herein refers to theC₁-C₃-alkyl group and C₁-C₆-alkyl group, as previously defined, attachedto the parent molecular moiety through an oxygen atom. Examples ofC₁-C₆-alkoxy radicals include, but not limited to, methoxy, ethoxy,propoxy, isopropoxy, n-butoxy, tert-butoxy, neopentoxy and n-hexoxy.

The term “halo” and “halogen” as used herein refer to an atom selectedfrom fluorine, chlorine, bromine and iodine.

The term “haloalkyl” includes “alkyl” wherein one or more such as 1, 2,3, 4, or 5 of the hydrogens have been replaced by a halo atom. Thehaloalkyl may be straight chain or branched chain “alkyl” unit.Non-limiting examples include —CH₂F, —CHF₂, —CF₃, —CH₂CH₂F, —CH₂CHF₂,—CH₂CF₃, —CF₂CH₂F, —CF₂CHF₂, —CF₂CF₃, —CH₂Cl, —CHCl₂, —CCl₃, —CH₂Br,—CHBr₂, and —CBr₃.

The term “fluoroalkyl” includes “alkyl” wherein one or more such as 1,2, 3, 4, or 5 of the hydrogens have been replaced by fluoro. Thefluoroalkyl may be straight chain or branched chain “alkyl” unit.Preferred fluoroalkyl groups include trifluoromethyl andpentafluoroethyl.

The term “pharmaceutically acceptable”, as used herein, refers to amaterial, including but not limited, to a salt, carrier or diluent,which does not abrogate the biological activity or properties of thecompound, and is relatively nontoxic, i.e., the material may beadministered to an individual without causing undesirable biologicaleffects or interacting in a deleterious manner with any of thecomponents of the composition in which it is contained.

The term “pharmaceutically acceptable salt” refers to those salts whichare, within the scope of sound medical judgment, suitable for use incontact with the tissues of humans and lower animals without unduetoxicity, irritation, allergic response and the like, and arecommensurate with a reasonable benefit/risk ratio. For example, S. M.Berge, et al. describes pharmaceutically acceptable salts in detail inJ. Pharmaceutical Sciences, 66: 1-19 (1977), incorporated herein byreference for this purpose. The salts are prepared in situ during thefinal isolation and purification of the compounds described herein, orseparately by reacting the free base function with a suitable organicacid. Examples of pharmaceutically acceptable, nontoxic acid additionsalts are salts of an amino group formed with inorganic acids such ashydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid andperchloric acid or with organic acids such as acetic acid, oxalic acid,maleic acid, tartaric acid, citric acid, succinic acid or malonic acidor by using other documented methodologies such as ion exchange. Otherpharmaceutically acceptable salts include adipate, alginate, ascorbate,aspartate, benzenesulfonate, benzoate, bisulfate, borate, butyrate,camphorate, camphorsulfonate, citrate, cyclopentanepropionate,digluconate, dodecylsulfate, ethanesulfonate, formate, fumarate,glucoheptonate, glycerophosphate, gluconate, hemisulfate, heptanoate,hexanoate, hydroiodide, 2-hydroxyethanesulfonate, lactobionate, lactate,laurate, lauryl sulfate, malate, maleate, malonate, methanesulfonate,2-naphthalenesulfonate, nicotinate, nitrate, oleate, oxalate, palmitate,pamoate, pectinate, persulfate, 3-phenylpropionate, phosphate, picrate,pivalate, propionate, stearate, succinate, sulfate, tartrate,thiocyanate, p-toluenesulfonate, undecanoate, valerate salts, and thelike. Representative alkali or alkaline earth metal salts includesodium, lithium, potassium, calcium, magnesium, and the like. Furtherpharmaceutically acceptable salts include, when appropriate, nontoxicammonium, quaternary ammonium, and amine cations formed usingcounterions such as halide, hydroxide, carboxylate, sulfate, phosphate,nitrate, loweralkyl sulfonate and aryl sulfonate.

It should be understood that a reference to a salt includes the solventaddition forms or crystal forms thereof, particularly solvates orpolymorphs. Solvates contain either stoichiometric or non-stoichiometricamounts of a solvent, and are often formed during the process ofcrystallization with pharmaceutically acceptable solvents such as water,ethanol, and the like. Hydrates are formed when the solvent is water, oralcoholates are formed when the solvent is alcohol. Polymorphs includethe different crystal packing arrangements of the same elementalcomposition of a compound. Polymorphs usually have different X-raydiffraction patterns, infrared spectra, melting points, density,hardness, crystal shape, optical and electrical properties, stability,and solubility. Various factors such as the recrystallization solvent,rate of crystallization, and storage temperature may cause a singlecrystal form to dominate.

The term “cyclodextrin,” as used herein, refers to cyclic carbohydratesconsisting of at least six to eight sugar molecules in a ring formation.The outer part of the ring contains water soluble groups; at the centerof the ring is a relatively nonpolar cavity able to accommodate smallmolecules.

The term “effective amount,” as used herein, refers to a sufficientamount of an agent or a compound being administered which will relieveto some extent one or more of the symptoms of the disease or conditionbeing treated. The result can be reduction and/or alleviation of thesigns, symptoms, or causes of a disease, or any other desired alterationof a biological system. An appropriate “effective” amount in anyindividual case may be determined using techniques, such as a doseescalation study.

The term “patient”, “subject” or “individual” are used interchangeably.As used herein, they refer to individuals suffering from a disorder, andthe like, encompasses mammals and non-mammals. None of the terms requirethat the individual be under the care and/or supervision of a medicalprofessional. Mammals are any member of the Mammalian class, includingbut not limited to humans, non-human primates such as chimpanzees, andother apes and monkey species; farm animals such as cattle, horses,sheep, goats, swine; domestic animals such as rabbits, dogs, and cats;laboratory animals including rodents, such as rats, mice and guineapigs, and the like. Examples of non-mammals include, but are not limitedto, birds, fish and the like. In some embodiments of the methods andcompositions provided herein, the individual is a mammal. In preferredembodiments, the individual is a human.

The terms “treat”, “treating” or “treatment”, as used herein, includealleviating, abating or ameliorating a disease or condition or one ormore symptoms thereof, preventing additional symptoms, ameliorating orpreventing the underlying metabolic causes of symptoms, inhibiting thedisease or condition, e.g., arresting the development of the disease orcondition, relieving the disease or condition, causing regression of thedisease or condition, relieving a condition caused by the disease orcondition, or stopping the symptoms of the disease or condition, and areintended to include prophylaxis. The terms further include achieving atherapeutic benefit and/or a prophylactic benefit. By therapeuticbenefit is meant eradication or amelioration of the underlying disorderbeing treated. Also, a therapeutic benefit is achieved with theeradication or amelioration of one or more of the physiological symptomsassociated with the underlying disorder such that an improvement isobserved in the individual, notwithstanding that the individual is stillbe afflicted with the underlying disorder. For prophylactic benefit, thecompositions are administered to an individual at risk of developing aparticular disease, or to an individual reporting one or more of thephysiological symptoms of a disease, even though a diagnosis of thisdisease has not been made.

The terms “preventing” or “prevention” refer to a reduction in risk ofacquiring a disease or disorder (i.e., causing at least one of theclinical symptoms of the disease not to develop in a subject that may beexposed to or predisposed to the disease but does not yet experience ordisplay symptoms of the disease).

The term “carrier” as used herein, refers to relatively nontoxicchemical compounds or agents that facilitate the incorporation of acompound into cells or tissues.

Compounds

Some embodiments of the present invention describe a pharmaceuticalcomposition comprising a compound (i.e., isoflavonoid derivative) ofgeneral formula I:

wherein

-   -   R₁ is hydrogen, hydroxy, halo, NR₁₄R₁₅, C₃₋₆cycloalkyl,        C₁₋₆alkoxy, C₁₋₆haloalkyl, C₂₋₆alkenyl, COOR₁₂, COR₁₃,        (O)_(n)C₁₋₄alkyleneNR₁₄R₁₅ is or C₁₋₆alkyl optionally        substituted by one or more hydroxy, chloro, bromo, iodo or        NR₁₄R₁₅ groups;    -   R₂, R₃, R₄, R₅, R₆, R₉, and R₁₀ are independently hydrogen,        hydroxy, halo, NR₁₄R₁₅, C₃₋₆cycloalkyl, C₁₋₆alkoxy,        C₁₋₆haloalkyl, C₂₋₆alkenyl, COOR₁₂, COR₁₃, or C₁-₆alkyl        optionally substituted by one or more hydroxy, chloro, bromo,        iodo or NR₁₄R₁₅ groups;    -   R₇ is hydrogen, hydroxy, halo, NR₁₄R₁₅, C₃₋₆cycloalkyl,        C₁₋₆alkoxy, C₂₋₆alkenyl, C₁₋₆haloalkyl or C₁₋₆alkyl optionally        substituted by one or more hydroxy, chloro, bromo, iodo or        NR₁₄R₁₅ groups;    -   the drawing        and R₂ together represent a double bond or the drawing        represents a single bond and R₁₁ is hydrogen, hydroxy, NR₁₄R₁₅,        C₁₋₃alkoxy, C₁₋₃fluoroalkyl, halo or C₁₋₃alkyl optionally        substituted by one or more hydroxy, chloro, bromo, iodo or        NR₁₄R₁₅ groups;    -   R₁₁ and RR₁₂ are independently hydrogen, C₁₋₆alkyl,        C₃₋₆cycloalkyl, or trialkyl silyl;    -   R₁₃ is hydrogen, C₁₋₆alkyl, C₃₋₆cycloalkyl or NR₁₄R₁₅;    -   n represents 0 or 1; and    -   R₁₄ and R₁₅ independently represent hydrogen or C₁₋₆alkyl or        NR₁₄R₁₅ is when taken together represents a 5 or 6 membered        heteroaromatic or heterocyclic,    -   or a pharmaceutically acceptable salt thereof.

In some embodiments, the pharmaceutical composition comprises a compound(i.e., isoflavonoid derivative) of formula II:

R₁ is hydroxy, alkoxy, haloalkyl, or halo;

R₂ is hydroxy or alkoxy;

R₃ is alkyl, halo, or haloalkyl;

R₄, R₅, and R₆, are independently hydrogen, hydroxy, alkoxy, halo,haloalkyl, or alkyl; and

R₇ is alkyl or hydrogen;

or a pharmaceutically acceptable salt thereof.

Some embodiments provided herein describe a compound of Formula II thathas a structure of Formula (II-a) or (II-b):

In some embodiments, R₁ is hydroxy. In other embodiments, R₁ isC₁-C₆alkoxy. In further or additional embodiments, R₁ is C₁-C₃alkoxy. Inother embodiments, R₁ is C₁-C₂alkoxy. In specific embodiments, R₁ ismethoxy. In specific embodiments, R₁ is ethoxy. In specific embodiments,R₁ is propoxy. In specific embodiments, R₁ is iso-propoxy. In specificembodiments, R₁ is butoxy. In specific embodiments, R₁ is iso-butoxy. Inspecific embodiments, R₁ is sec-butoxy. In specific embodiments, R₁ istert-butoxy. In specific embodiments, R₁ is pentyloxy. In specificembodiments, R₁ is hexyloxy. In further or alternative embodiments, R₁is fluoro. In other embodiments, R₁ is chloro. In other embodiments, R₁is iodo. In other embodiments, R₁ is bromo. In other embodiments, R₁ ishaloalkyl. In other embodiments, R₁ is haloC₁₋₆alkyl. In otherembodiments, R₁ is haloC₁₋₃alkyl. In other embodiments, R₁ ishaloC₁₋₂alkyl. In specific embodiments, R₁ is monofluoromethyl. Inspecific embodiments, R₁ is difluoromethyl. In specific embodiments, R₁is trifluoromethyl.

In further or additional embodiments, R₂ is hydroxy. In someembodiments, R₂ is C₁-C₆alkoxy. In further or additional embodiments, R₂is C₁-C₃alkoxy. In further or additional embodiments, R₂ is C₁-C₂alkoxy.In specific embodiments, R₂ is methoxy. In specific embodiments, R₂ isethoxy. In specific embodiments, R₂ is propoxy. In specific embodiments,R₂ is iso-propoxy. In specific embodiments, R₂ is butoxy. In specificembodiments, R₂ is iso-butoxy. In specific embodiments, R₂ issec-butoxy. In specific embodiments, R₂ is tert-butoxy. In specificembodiments, R₂ is pentyloxy. In specific embodiments, R₂ is hexyloxy.

In some embodiments, compounds of the general formula (II) have thesubstituents R₁, R₃, and R₄ distributed as shown below:

In further or additional embodiments, R₃ is C₁-C₆alkyl. In otherembodiments, R₃ is C₁-C₃alkyl. In other embodiments, R₃ is C₁-C₂alkyl.In specific embodiments, R₃ is methyl. In specific embodiments, R₃ isethyl. In specific embodiments, R₃ is propyl. In specific embodiments,R₃ is iso-propyl. In specific embodiments, R₃ is butyl. In specificembodiments, R₃ is iso-butyl. In specific embodiments, R₃ is sec-butyl.In specific embodiments, R₃ is tert-butyl. In specific embodiments, R₃is pentyl. In specific embodiments, R₃ is hexyl. In further oralternative embodiments, R₃ is fluoro. In other embodiments, R₃ ischloro. In other embodiments, R₃ is iodo. In other embodiments, R₃ isbromo. In other embodiments, R₃ is haloalkyl. In other embodiments, R₃is haloC₁₋₆alkyl. In other embodiments, R₃ is haloC₁₋₃alkyl. In otherembodiments, R₃ is haloC₁₋₂alkyl. In specific embodiments, R₃ ismonofluoromethyl. In specific embodiments, R₃ is difluoromethyl. Inspecific embodiments, R₃ is trifluoromethyl.

In further or additional embodiments, R₄ is hydrogen. In further oralternative embodiments, R₄ is halo. In specific embodiments, R₄ isfluoro. In other embodiments, R₄ is haloalkyl. In other embodiments, R₄is haloC₁₋₆alkyl. In other embodiments, R₄ is haloC₁₋₃alkyl. In otherembodiments, R₄ is haloC₁₋₂alkyl. In specific embodiments, R₄ ismonofluoromethyl. In specific embodiments, R₄ is difluoromethyl. Inspecific embodiments, R₄ is trifluoromethyl. In further or alternativeembodiments, R₄ is C₁-C₆alkyl. In other embodiments, R₄ is C₁-C₃alkyl.In other embodiments, R₄ is C₁-C₂alkyl. In specific embodiments, R₄ ismethyl. In specific embodiments, R₄ is ethyl. In specific embodiments,R₄ is propyl. In specific embodiments, R₄ is iso-propyl.

Some embodiments provided herein describe a compound of formula IIwherein R₃ and R₆ are hydrogen. In specific embodiments, R₅ is hydrogen.In other specific embodiments, R₆ is hydrogen.

In other embodiments, R₅ is alkyl. In other embodiments, R₅ isC₁-C₆alkyl. In other embodiments, R₅ is C₁-C₃alkyl. In otherembodiments, R₅ is C₁-C₂alkyl. In specific embodiments, R₅ is methyl. Inspecific embodiments, R₅ is ethyl. In specific embodiments, R₅ ispropyl. In specific embodiments, R₅ is iso-propyl. In other embodiments,R₅ is halo. In other embodiments, R₅ is fluoro. In other embodiments, R₅is bromo. In other embodiments, R₅ is chloro. In other embodiments, R₅is iodo. In other embodiments, R₅ is haloalkyl. In other embodiments, R₅is haloC₁₋₆alkyl. In other embodiments, R₅ is haloC₁₋₂alkyl. In otherembodiments, R₅ is haloC₁₋₂alkyl. In specific embodiments, R₅ ismonofluoromethyl. In specific embodiments, R₅ is difluoromethyl. Inspecific embodiments, R₅ is trifluoromethyl.

In still further or alternative embodiments, R₆ is alkyl, haloalkyl orhalo. In other embodiments, R₆ is alkyl. In other embodiments, R₆ isC₁-C₆alkyl. In other embodiments, R₆ is C₁-C₃alkyl. In otherembodiments, R₆ is C₁-C₂alkyl. In specific embodiments, R₆ is methyl. Inspecific embodiments, R₆ is ethyl. In specific embodiments, R₆ ispropyl. In specific embodiments, R₆ is iso-propyl. In other embodiments,R₆ is halo. In other embodiments, R₆ is fluoro. In other embodiments, R₆is bromo. In other embodiments, R₆ is chloro. In other embodiments, R₆is iodo. In other embodiments, R₆ is haloalkyl. In other embodiments, R₆is haloC₁₋₆alkyl. In other embodiments, R₆ is haloC₁₋₃alkyl. In otherembodiments, R₆ is haloC₁₋₂alkyl. In specific embodiments, R₆ ismonofluoromethyl. In specific embodiments, R₆ is difluoromethyl. Inspecific embodiments, R₆ is trifluoromethyl.

In some embodiments, R₇ is C₁-C₆alkyl. In other embodiments, R₇ isC₁-C₃alkyl. In other embodiments, R₇ is C₁-C₂alkyl. In specificembodiments, R₇ is methyl. In specific embodiments, R₇ is ethyl. Inspecific embodiments, R₇ is propyl. In specific embodiments, R₇ isisopropyl. In alternative embodiments, R₇ is hydrogen.

Provided herein, in some embodiments, is a pharmaceutical compositioncomprising a compound (i.e., isoflavonoid derivative) of formula III:

wherein

-   -   R₂ is hydroxy or alkoxy;    -   R₃, R₄, R₅, and R₆ are independently hydrogen, hydroxy, alkoxy,        halo, haloalkyl, or alkyl; and    -   R₇ is alkyl;    -   or a pharmaceutically acceptable salt thereof.

Some embodiments provided herein describe a compound of Formula III thathas a structure of Formula (III-a) or (III-b):

In some embodiments, R₂ is hydroxy. In other embodiments, R₂ isC₁-C₆alkoxy. In further or additional embodiments, R₂ is C₁-C₃alkoxy. Inspecific embodiments, R₂ is methoxy, ethoxy, propoxy, iso-propoxy,butoxy, iso-butoxy, sec-butoxy, tert-butoxy, pentyloxy or hexyloxy. Inspecific embodiments, R₂ is methoxy.

In further or additional embodiments, R₃ is C₁-C₆alkyl. In otherembodiments, R₃ is C₁-C₃alkyl. In other embodiments, R₃ is C₁-C₂alkyl.In other embodiments, R₃ is methyl. In other embodiments, R₃ is ethyl.In other embodiments, R₃ is propyl. In other embodiments, R₃ isiso-propyl. In other embodiments, R₃ is butyl. In other embodiments, R₃is iso-butyl. In other embodiments, R₃ is sec-butyl. In otherembodiments, R₃ is tert-butyl. In other embodiments, R₃ is pentyl. Inother embodiments, R₃ is hexyl. In alternative embodiments, R₃ ishydrogen. In other embodiments, R₃ is halo. In other embodiments, R₃ isfluoro. In other embodiments, R₃ is chloro. In other embodiments, R₃ isbromo. In other embodiments, R₃ is haloalkyl. In other embodiments, R₃is haloC₁₋₆alkyl. In other embodiments, R₃ is haloC₁₋₃alkyl. In otherembodiments, R₃ is haloC₁₋₂alkyl. In specific embodiments, R₃ ismonofluoromethyl. In specific embodiments, R₃ is difluoromethyl. Inspecific embodiments, R₃ is trifluoromethyl.

In further or additional embodiments, R₄ is hydrogen. In further oralternative embodiments, R₄ is halo. In specific embodiments, R₄ isfluoro. In specific embodiments, R₄ is chloro. In specific embodiments,R₄ is bromo. In other embodiments, R₄ is haloalkyl. In otherembodiments, R₄ is haloC₁₋₆alkyl. In other embodiments, R₄ ishaloC₁₋₃alkyl. In other embodiments, R₄ is haloC₁₋₂alkyl. In specificembodiments, R₄ is monofluoromethyl. In specific embodiments, R₄ isdifluoromethyl. In specific embodiments, R₄ is trifluoromethyl. In otherembodiments, R₄ is C₁-C₆alkyl. In other embodiments, R₄ is C₁-C₃alkyl.In other embodiments, R₄ is C₁-C₂alkyl. In other embodiments, R₄ ismethyl. In other embodiments, R₄ is ethyl. In other embodiments, R₄ ispropyl. In other embodiments, R₄ is iso-propyl.

In some embodiments, R₇ is C₁-C₆alkyl. In other embodiments, R₇ isC₁-C₃alkyl. In other embodiments, R₇ is C₁-C₂alkyl. In specificembodiments, R₇ is methyl. In other embodiments, R₇ is ethyl. In otherembodiments, R₇ is propyl. In other embodiments, R₇ is iso-propyl. Inother embodiments, R₇ is butyl. In other embodiments, R₇ is iso-butyl.In other embodiments, R₇ is sec-butyl. In other embodiments, R₇ istert-butyl. In other embodiments, R₇ is pentyl. In other embodiments, R₇is hexyl.

In some embodiments, compounds of the general Formula III have thesubstituents R₃ and R₄ distributed as shown below:

In some embodiments, compounds of the general Formula I, II, or III havethe substituents R₂, R₅, and R₆ distributed as shown below:

Specific compounds of Formula I, II, or III are shown below:

or salts or a derivative thereof.

In specific embodiments, a compound of Formula I, II, or III include:

-   3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)chroman-7-ol    (compound 1);-   3-(4-hydroxyphenyl)-4-(4-hydroxy-3-methylphenyl)chroman-7-ol    (compound 2);-   3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)chroman-7-ol    (compound 3);-   3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)chroman-7-ol    (compound 4);-   3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-ol    (compound 5);-   3-(4-hydroxyphenyl)-4-(4-hydroxy-3-methylphenyl)-8-methylchroman-7-ol    (compound 6);-   3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)-8-methylchroman-7-ol    (compound 7);-   3-(4-hydroxyphenyl)-4-(4-methoxy-3,5-dimethylphenyl)-8-methylchroman-7-ol    (compound 8);-   3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)-8-methylchroman-7-ol    (compound 9); and-   3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)-8-methylchroman-7-ol    (compound 10).

It will be clear to persons skilled in the art that in the compoundsaccording to certain embodiments of the invention, the aryl substituentson the heterocyclic ring can be cis or trans relative to each other.Preferably in the compounds of Formula I, II, or III according tocertain embodiments of the invention, these substituents will be cis.

The compounds of Formula I, II, or III according to some embodiments ofthis invention include two chiral centers. The present inventionincludes all the enantiomers and diastereomers as well as mixturesthereof in any proportions. The invention also extends to isolatedenantiomers or pairs of enantiomers. Some of the compounds herein(including, but not limited to isoflavonoid derivatives and reagents forproducing the aforementioned compounds) have asymmetric carbon atoms andcan therefore exist as enantiomers or diastereomers. Diastereomericmixtures can be separated into their individual diastereomers on thebasis of their physical chemical differences by methods such aschromatography and/or fractional crystallization. Enantiomers can beseparated by converting the enantiomeric mixture into a diastereomericmixture by reaction with an appropriate optically active compound (e.g.,alcohol), separating the diastereomers and converting (e.g.,hydrolyzing) the individual diastereomers to the corresponding pureenantiomers. All such isomers, including diastereomers, enantiomers, andmixtures thereof are considered as part of the compositions describedherein.

The compounds of Formula I, II, or III according to some embodiments areracemic mixture. In other embodiments, any compound described herein isin the optically pure form (e.g., optically active (+) and (−), (R)− and(S)−, d- and l-, or (D)- and (L)-isomers). In certain preferredembodiments, a compound of Formula I, II, or III is the d-isomer.Accordingly, provided herein, in some embodiments, is the opticallyactive d-isomer having a structure of Formula I, II, or III inenantiomeric excess. In some embodiments, the d-isomer of a compound ofFormulas I, II, or III is provided in at least 50%, 55%, 60%, 65%, 70%,75%, 80%, 85%, 88%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%,95%, or 99.9% enantiomeric excess. In other embodiments, the d-isomer ofa compound of Formulas I, II, or III is provided in greater than 50%,55%, 60%, 65%, 70%, 75%, 80%, 85%, 88%, 90%, 91%, 92%, 93%, 94%, 95%,96%, 97%, 98%, 99%, 99.5%, or 99.9% enantiomeric excess. In specificembodiments, of a compound of Formulas I, II, or III has greater than95% enantiomeric excess.

Specific optically active compounds (i.e., enantiomers) of Formula I,II, or III are shown below:

In specific embodiments, a compound of Formula I, II, or III include:

-   d-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)chroman-7-ol    (d-1);-   d-cis-3-(4-hydroxyphenyl)-4-(4-hydroxy-3-methylphenyl)chroman-7-ol    (d-2);-   d-cis-3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)chroman-7-ol    (d-3);-   d-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)chroman-7-ol    (d-4);-   d-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-ol    (d-5);-   d-cis-3-(4-hydroxyphenyl)-4-(4-hydroxy-3-methylphenyl)-8-methylchroman-7-ol    (d-6);-   d-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)-8-methylchroman-7-ol    (d-7);-   d-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3,5-dimethylphenyl)-8-methylchroman-7-ol    (d-8);-   d-cis-3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)-8-methylchroman-7-ol    (d-9); and-   d-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)-8-methylchroman-7-ol    (d-10).-   In other specific embodiments, a compound of Formula I, II, or III    include:-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)chroman-7-ol    (l-1);-   l-cis-3-(4-hydroxyphenyl)-4-(4-hydroxy-3-methylphenyl)chroman-7-ol    (l-2);-   l-cis-3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)chroman-7-ol    (l-3);-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)chroman-7-ol    (l-4);-   l-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-ol    (l-5);-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)-8-methylchroman-7-ol    (l-6);-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-methylphenyl)-8-methylchroman-7-ol    (l-7);-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3,5-dimethylphenyl)-8-methylchroman-7-ol    (l-8);-   l-cis-3-(4-hydroxyphenyl)-4-(4-fluoro-3-methylphenyl)-8-methylchroman-7-ol    (l-9); and-   l-cis-3-(4-hydroxyphenyl)-4-(4-methoxy-3-fluorophenyl)-8-methylchroman-7-ol    (l-10).

Some embodiments provided herein describe a compound of Formula IVwherein R₈ is hydrogen or alkyl. In some embodiments, R₈ is hydrogen. Inother embodiments, R₈ is C₁₋₆alkyl. In other embodiments, R₈ isC₁₋₃alkyl. In other embodiments, R₈ is C₁₋₂alkyl. In specificembodiments, R₈ is methyl. In specific embodiments, R₈ is ethyl. Inspecific embodiments, R₈ is propyl. In specific embodiments, R₈ isiso-propyl. In specific embodiments, R₈ is butyl. In specificembodiments, R₈ is iso-butyl. In specific embodiments, R₈ is sec-butyl.In specific embodiments, R₈ is tert-butyl. In specific embodiments, R₈is pentyl. In specific embodiments, R₈ is hexyl.

Specific optically active compounds (i.e., enantiomers) of Formula IVinclude:

In specific embodiments, a compound of Formula IV includesd-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)chroman-7-ol. In otherembodiments, a compound of Formula IV includesd-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-ol.

In certain preferred embodiments, a compound of Formula IV is thed-isomer. Accordingly, provided herein, in some embodiments, is theoptically active d-isomer having a structure of Formula IV inenantiomeric excess. In some embodiments, the d-isomer of a compound ofFormula IV is provided in at least 50%, 55%, 60%, 65%, 70%, 75%, 80%,85%, 88%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 95.5%, or99.9% enantiomeric excess. In other embodiments, the d-isomer of acompound of Formula IV is provided in greater than 50%, 55%, 60%, 65%,70%, 75%, 80%, 85%, 88%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%,99%, 99.5%, or 99.9% enantiomeric excess. In specific embodiments, acompound of Formula IV has greater than 95% enantiomeric excess. Inspecific embodiments, a compound of Formula IV has greater than 98%enantiomeric excess. In specific embodiments, a compound of Formula IVhas greater than 99% enantiomeric excess. In specific embodiments, acompound of Formula IV has greater than 99.9% enantiomeric excess.

In additional or further embodiments, the compounds described herein areused in the form of pro-drugs. In additional or further embodiments, thecompounds described herein are metabolized upon administration to anorganism in need to produce a metabolite that is then used to produce adesired effect, including a desired therapeutic effect.

Any compound described herein may be synthesized according to theexemplary synthesis shown in Schemes 1 and 2. For example, compounds 6and 7 are synthesized from4′-bis-tert-butyldimethylsilyoxy-8-methyldihydrodaidzein.4′-bis-tert-butyldimethylsilyoxy-8-methyldihydrodaidzein is treated with4-methoxy-3-methylphenylmagnesium bromide in anhydrous THF. The reactionmixture is treated with wet ether (50:50 H₂OEt₂O). The resultant mixtureis extracted with Et₂O. The organic layer is washed with water, brine,dried over anhydrous magnesium sulfate and concentrated in vacuo. Theresultant residue is treated with pTsOH and ethanol. The reactionmixture is heated to reflux for 3 hours. The reaction mixture isconcentrated in vacuo then poured into water (0° C.). The mixture isextracted with EtOAc, then the organic layer is washed with water (3×),brine, dried (MgSO₄), filtered and concentrated in vacuo to provide the3-alkene intermediate. The intermediate is treated with Pd catalyst andethanol. The reaction mixture is hydrogenated at low pressure for 3 h.The reaction is filtered through Celite and the filtrate is concentratedto a volume of 15 mL. The resultant solution is added to water. Themixture is extracted with Et₂O (3×), the organic layers are combined andwashed with water, brine, dried (MgSO₄), filtered and concentrated invacuo. The resultant residue is purified by recrystallization to providecompound 7.

Compound 7 is transferred to a flask purged with nitrogen. Hydrogenbromide in acetic acid (33 wt %) is added drop-wise to the reactionmixture. The mixture is heated to reflux at 130° C. for 7 h. Thereaction mixture is placed in an ice bath and the pH is adjusted 6. Thereaction mixture is extracted with EtOAc and the organic layer is washedwith water, brine, dried (MgSO₄), filtered and concentrated in vacuo.The resultant residue is purified by column chromatography to yieldcompound 6.

Methods

Some embodiments provided herein describe a method of inducing apoptosisin a cancer cell. In specific embodiments, the method comprisescontacting the cancer cell with a composition comprising an isoflavonoidderivative of Formula I, II, III, or IV. Also described herein, in otherembodiments, is a method of treating cancer in an individual in need ofcancer therapy. In certain embodiments, the method comprisesadministering to the individual the composition comprising a compound(i.e., isoflavonoid derivative) of Formula I, II, III, or IV. In certainembodiments, the cancer or cancer cell is present in an individual. Inspecific embodiments, the individual is in need of cancer therapy.

In other embodiments, provided herein is a method of increasing,inducing, or restoring sensitivity of a cancer cell to achemotherapeutic agent, anti-cancer agent or radiation therapy. Incertain embodiments, the method comprises contacting said cell with acomposition comprising a compound (i.e., isoflavonoid derivative) ofFormula I, II, III, or IV. In other embodiments, provided herein is amethod of increasing, inducing, or restoring sensitivity to a cancertherapy in an individual. In certain embodiments, the method comprisesadministering to the individual a composition comprising a compound(i.e., isoflavonoid derivative) of Formula I, II, III, or IV.

In some embodiments, the cancer or cancer cell has lost sensitivity to achemotherapeutic agent, anti-cancer agent or radiation therapy. In otherembodiments, the combination of a composition comprising a compound ofFormula I, II, III, or IV and a chemotherapeutic agent, anti-canceragent or radiation therapy has an enhanced effect. In some embodiments,the compounds described herein chemosensitize cancer cells, whereincompounds lower the amount of anti-cancer agent that is required to killthe cancer cell. In other embodiments, the compounds described hereinchemosensitize cancer cells, wherein the compounds convert cancer cellsfrom a state of chemo-resistant to chemo-sensitive. In further oradditional embodiments, the compounds described herein radiosensitizecancer cells, wherein compounds lower the amount of gamma-irradiationthat is required to kill the cancer cell. In other embodiments, thecompounds described herein radiosensitize cancer cells, wherein thecompounds convert cancer cells from a state of radio-resistant toradio-sensitive.

Provided herein in some embodiments, is a method to treat cancer in anindividual, comprising administering to the individual a compositioncomprising a compound (i.e., isoflavonoid derivative) of Formula I, II,III, or IV, wherein the side-effects associated with chemotherapy,radiotherapy, or cancer therapy is reduced or minimized. In someinstances, the compounds described herein provide chemo-protectiveand/or radio-protective properties to non-cancerous cells. In otherembodiments, the use of the d-isomer of the compounds described hereinlowers the amount of the compound that is required to kill the cancercell or treat the cancer. In further or additional embodiments, thelower amount of compound reduces or minimizes any undesired side-effectsassociated with chemotherapy. Non-limiting examples of side-effectsassociated with chemotherapy, radiotherapy or cancer therapy includefatigue, anemia, appetite changes, bleeding problems, diarrhea,constipation, hair loss, nausea, vomiting, pain, peripheral neuropathy,swelling, skin and nail changes, urinary and bladder changes, andtrouble swallowing.

Any of the method described herein, in some embodiments, furthercomprise administering cancer therapy to the individual or patient. Incertain embodiments, the cancer therapy is, by way of non-limitingexample, at least one anti-cancer agent (e.g., chemotherapeutic agent),radiation therapy, or surgery. In some embodiments, a combination of (1)administration of an effective amount of a compound described herein and(2) 1 to 3 therapies selected from the group consisting of (i)administration of an effective amount of an additional anticanceragents, (ii) administration of an effective amount of hormonaltherapeutic agents and (iii) non-drug therapy prevents and/or treatscancer more effectively.

An anti-cancer agent includes but is not limited to a chemotherapeuticagent, immunotherapeutic agent, a pharmaceutical agent that inhibits theaction of cell growth factor and a receptor thereof and the like. Amongthe chemotherapeutic agents that are optionally employed, by way ofnon-limiting example, are cisplatin, carboplatin, paclitaxel,gemcitabine or doxorubicin. Further, non-limiting examples ofchemotherapeutic agents include alkylating agents, antimetabolites,anticancer antibiotics, plant-derived anticancer agents, and the like.

Alkylating agents include but are not limited to nitrogen mustard,nitrogen mustard-N-oxide hydrochloride, chlorambutyl, cyclophosphamide,ifosfamide, thiotepa, carboquone, improsulfan tosylate, busulfan,nimustine hydrochloride, mitobronitol, melphalan, dacarbazine,ranimustine, sodium estramustine phosphate, triethylenemelamine,carmustine, lomustine, streptozocin, pipobroman, etoglucid, carboplatin,cisplatin, miboplatin, nedaplatin, oxaliplatin, altretamine,ambamustine, dibrospidium hydrochloride, fotemustine, prednimustine,pumitepa, ribomustin, temozolomide, treosulphan, trophosphamide,zinostatin stimalamer, adozelesin, cystemustine, bizelesin, and thelike.

Antimetabolites include but are not limited to mercaptopurine,6-mercaptopurine riboside, thioinosine, methotrexate, enocitabine,cytarabine, cytarabine ocfosfate, ancitabine hydrochloride, 5-FU drugs(e.g., fluorouracil, tegafur, UFT, doxifluridine, carmofur,gallocitabine, emitefur, and the like), aminopterine, leucovorincalcium, tabloid, butocine, folinate calcium, levofolinate calcium,cladribine, emitefur, fludarabine, gemcitabine, hydroxycarbamide,pentostatin, piritrexim, idoxuridine, mitoguazone, thiazophrine,ambamustine and the like.

Anticancer antibiotics include but are not limited to actinomycin-D,actinomycin-C, mitomycin-C, chromomycin-A3, bleomycin hydrochloride,bleomycin sulfate, peplomycin sulfate, daunorubicin hydrochloride,doxorubicin hydrochloride, aclarubicin hydrochloride, pirarubicinhydrochloride, epirubicin hydrochloride, neocarzinostatin, mithramycin,sarcomycin, carzinophilin, mitotane, zorubicin hydrochloride,mitoxantrone hydrochloride, idarubicin hydrochloride, and the like.

Plant-derived anticancer agents include but are not limited toetoposide, etoposide phosphate, vinblastine sulfate, vincristinesulfate, vindesine sulfate, teniposide, paclitaxel, docetaxel,vinorelbine, and the like.

Immunotherapeutic agents include but are not limited to picibanil,krestin, sizofuran, lentinan, ubenimex, interferons, interleukins,macrophage colony-stimulating factor, granulocyte colony-stimulatingfactor, erythropoietin, lymphotoxin, BCG vaccine, Corynebacteriumparvum, levamisole, polysaccharide K, procodazole, and the like.

Non-limiting examples of a cell growth factor in pharmaceutical agentsthat inhibit the action of cell growth factors or cell growth factorreceptors include any substances that promote cell proliferation, whichare normally peptides having a molecular weight of not more than 20,000that are capable of exhibiting their activity at low concentrations bybinding to a receptor, including (1) EGF (epidermal growth factor) orsubstances possessing substantially the same activity as it [e.g., EGF,heregulin, and the like], (2) insulin or substances possessingsubstantially the same activity as it [e.g., insulin, IGF (insulin-likegrowth factor)-1, IGF-2, and the like], (3) FGF (fibroblast growthfactor) or substances possessing substantially the same activity as it[e.g., acidic FGF, basic FGF, KGF (keratinocyte growth factor), FGF-10,and the like], (4) other cell growth factors [e.g., CSF (colonystimulating factor), EPO (erythropoietin), IL-2 (interleukin-2), NGF(nerve growth factor), PDGF (platelet-derived growth factor), TGFβ(transforming growth factor β), HGF (hepatocyte growth factor), VEGF(vascular endothelial growth factor), and the like], and the like.

Cell growth factor receptors include but are not limited to anyreceptors capable of binding to the aforementioned cell growth factors,including EGF receptor, heregulin receptor (HER2), insulin receptor, IGFreceptor, FGF receptor-1 or FGF receptor-2, and the like.

Pharmaceutical agent that inhibits the action of cell growth factorinclude but are not limited to HER2 antibody (e.g., trastuzumab),imatinib mesylate, ZD1839 or EGFR antibody (e.g., cetuximab), antibodyto VEGF (e.g., bevacizumab), VEGFR antibody, VEGFR inhibitor, and EGFRinhibitor (e.g., erlotinib).

In addition to the aforementioned drugs, other anti-cancer agentsinclude but are not limited to L-asparaginase, aceglatone, procarbazinehydrochloride, protoporphyrin-cobalt complex salt, mercurichematoporphyrin-sodium, topoisomerase I inhibitors (e.g., irinotecan,topotecan, and the like), topoisomerase II inhibitors (e.g., sobuzoxane,and the like), differentiation inducers (e.g., retinoid, vitamin D, andthe like), angiogenesis inhibitors (e.g., thalidomide, SU11248, and thelike), α-blockers (e.g., tamsulosin hydrochloride, naftopidil, urapidil,alfuzosin, terazosin, prazosin, silodosin, and the like)serine/threonine kinase inhibitor, endothelin receptor antagonist (e.g.,atrasentan, and the like), proteasome inhibitor (e.g., bortezomib, andthe like), Hsp 90 inhibitor (e.g., 17-AAG, and the like),spironolactone, minoxidil, 11α-hydroxyprogesterone, bone resorptioninhibiting/metastasis suppressing agent (e.g., zoledronic acid,alendronic acid, pamidronic acid, etidronic acid, ibandronic acid,clodronic acid) and the like.

Non-limiting examples of hormonal therapeutic agents include fosfestrol,diethylstylbestrol, chlorotrianisene, medroxyprogesterone acetate,megestrol acetate, chlormadinone acetate, cyproterone acetate, danazol,dienogest, asoprisnil, allylestrenol, gestrinone, nomegestrol, Tadenan,mepartricin, raloxifene, ormeloxifene, levormeloxifene, anti-estrogens(e.g., tamoxifen citrate, toremifene citrate, and the like), ERdown-regulator (e.g., fulvestrant and the like), human menopausalgonadotrophin, follicle stimulating hormone, pill preparations,mepitiostane, testrolactone, aminoglutethimide, LH-RH agonists (e.g.,goserelin acetate, buserelin, leuprorelin, and the like), droloxifene,epitiostanol, ethinylestradiol sulfonate, aromatase inhibitors (e.g.,fadrozole hydrochloride, anastrozole, retrozole, exemestane, vorozole,formestane, and the like), anti-androgens (e.g., flutamide, bicartamide,nilutamide, and the like), 5α-reductase inhibitors (e.g., finasteride,dutasteride, epristeride, and the like), adrenocorticohormone drugs(e.g., dexamethasone, prednisolone, betamethasone, triamcinolone, andthe like), androgen synthesis inhibitors (e.g., abiraterone, and thelike), and retinoid and drugs that retard retinoid metabolism (e.g.,liarozole, and the like), etc. and LH-RH agonists (e.g., goserelinacetate, buserelin, leuprorelin).

The non-drug therapy is exemplified by surgery, radiotherapy, genetherapy, thermotherapy, cryotherapy, laser cauterization, and the like,and any combinations thereof.

When a compound (i.e., isoflavonoid derivative) of Formula I, II, III,or IV and a concomitant drug are used in combination, the administrationtime of the isoflavonoid derivative and the concomitant drug is notrestricted. In some embodiments, the isoflavonoid derivative and theconcomitant drug are administered to an individual simultaneously. Inother embodiments, the isoflavonoid derivative and the concomitant drugare administered at staggered times.

In some embodiments, the cancer is selected from the group consisting ofbladder cancer, breast cancer, metastatic breast cancer, metastaticHER2-negative breast cancer, colon cancer, rectal cancer, metastaticcolorectal cancer, endometrial cancer, cervical cancer, uterine cancer,ovarian cancer, kidney cancer, liver cancer, leukemia, lung cancer (bothsmall cell and non-small cell), squamous non-small cell lung cancer,non-squamous non-small cell lung cancer, melanoma, non-Hodgkin lymphoma,pancreatic cancer, testicular cancer, prostate cancer, thyroid cancer,sarcoma (including osteosarcoma), esophageal cancer, gastric cancer,head and neck cancer, lung cancer melanoma, myeloma, neuroblastoma,glioblastoma, and cancers of the brain. In some embodiments, the canceris selected from, by way of non-limiting example, human breast,prostate, ovarian, pancreatic, or cervical cancer. In certain specificembodiments, the cancer is human breast cancer or ovarian cancer.

Formulation

Some embodiments provided herein describe a pharmaceutical composition,wherein the composition further comprises one or more pharmaceuticalcarriers, excipients, auxiliaries, binders and/or diluents.

Any composition described herein optionally comprises minor amounts ofnon-toxic auxiliary substances such as wetting or emulsifying agents, pHbuffering agents, stabilizers, solubility enhancers, and other suchagents, such as for example, sodium acetate, sorbitan monolaurate,triethanolamine oleate and cyclodextrins. In some embodiments, thecomposition further comprises one or more of lactose, dextrose,mannitol, pH buffering agents, antioxidant agents, preservative agents,tonicity adjusters or a combination thereof. Examples ofpharmaceutically acceptable carriers that are optionally used include,but are not limited to aqueous vehicles, nonaqueous vehicles,antimicrobial agents, local anesthetics, suspending and dispersingagents, emulsifying agents, sequestering or chelating agents and otherpharmaceutically acceptable substances.

In some embodiments, the compounds described herein exist as theirpharmaceutically acceptable salts. In some embodiments, the methodsdisclosed herein include methods of treating diseases by administeringsuch pharmaceutically acceptable salts. In some embodiments, the methodsdisclosed herein include methods of treating diseases by administeringsuch pharmaceutically acceptable salts as pharmaceutical compositions.

In some embodiments, the compounds described herein possess acidic orbasic groups and therefore react with any of a number of inorganic ororganic bases, and inorganic and organic acids, to form apharmaceutically acceptable salt. In some embodiments, these salts areprepared in situ during the final isolation and purification of thecompounds of the invention, or by separately reacting a purifiedcompound in its free form with a suitable acid or base, and isolatingthe salt thus formed.

Examples of pharmaceutically acceptable salts include those saltsprepared by reaction of the compounds described herein with a mineral,organic acid or inorganic base, such salts including, acetate, acrylate,adipate, alginate, aspartate, benzoate, benzenesulfonate, bisulfate,bisulfite, bromide, butyrate, butyn-1,4-dioate, camphorate,camphorsulfonate, caproate, caprylate, chlorobenzoate, chloride,citrate, cyclopentanepropionate, decanoate, digluconate,dihydrogenphosphate, dinitrobenzoate, dodecylsulfate, ethanesulfonate,formate, fumarate, glucoheptanoate, glycerophosphate, glycolate,hemisulfate, heptanoate, hexanoate, hexyne-1,6-dioate, hydroxybenzoate,γ-hydroxybutyrate, hydrochloride, hydrobromide, hydroiodide,2-hydroxyethanesulfonate, iodide, isobutyrate, lactate, maleate,malonate, methanesulfonate, mandelate. metaphosphate, methanesulfonate,methoxybenzoate, methylbenzoate, monohydrogenphosphate,1-napthalenesulfonate, 2-napthalenesulfonate, nicotinate, nitrate,palmoate, pectinate, persulfate, 3-phenylpropionate, phosphate, picrate,pivalate, propionate, pyrosulfate, pyrophosphate, propiolate, phthalate,phenylacetate, phenylbutyrate, propanesulfonate, salicylate, succinate,sulfate, sulfite, succinate, suberate, sebacate, sulfonate, tartrate,thiocyanate, tosylate undeconate and xylenesulfonate.

Further, the compounds described herein, in some embodiments, areprepared as pharmaceutically acceptable salts formed by reacting thefree base form of the compound with a pharmaceutically acceptableinorganic or organic acid, including, but not limited to, inorganicacids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitricacid, phosphoric acid metaphosphoric acid, and the like; and organicacids such as acetic acid, propionic acid, hexanoic acid,cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid,malonic acid, succinic acid, malic acid, maleic acid, fumaric acid,Q-toluenesulfonic acid, tartaric acid, trifluoroacetic acid, citricacid, benzoic acid, 3-(4-hydroxybenzoyl)benzoic acid, cinnamic acid,mandelic acid, arylsulfonic acid, methanesulfonic acid, ethanesulfonicacid, 1,2-ethanedisulfonic acid, 2-hydroxyethanesulfonic acid,benzenesulfonic acid, 2-naphthalenesulfonic acid,4-methylbicyclo-[2.2.2]oct-2-ene-1-carboxylic acid, glucoheptonic acid,4,4′-methylenebis-(3-hydroxy-2-ene-1-carboxylic acid), 3-phenylpropionicacid, trimethylacetic acid, tertiary butylacetic acid, lauryl sulfuricacid, gluconic acid, glutamic acid, hydroxynaphthoic acid, salicylicacid, stearic acid and muconic acid. In some embodiments, other acids,such as oxalic, while not in themselves pharmaceutically acceptable, areemployed in the preparation of salts useful as intermediates inobtaining the compounds of the invention and their pharmaceuticallyacceptable acid addition salts.

In some embodiments, those compounds described herein which comprise afree acid group react with a suitable base, such as the hydroxide,carbonate, bicarbonate, sulfate, of a pharmaceutically acceptable metalcation, with ammonia, or with a pharmaceutically acceptable organicprimary, secondary or tertiary amine. Representative alkali or alkalineearth salts include the lithium, sodium, potassium, calcium, magnesium,and aluminum salts and the like. Illustrative examples of bases includesodium hydroxide, potassium hydroxide, choline hydroxide, sodiumcarbonate, N⁺(C₁₋₄alkyl)₄, and the like.

Representative organic amines useful for the formation of base additionsalts include ethylamine, diethylamine, ethylenediamine, ethanolamine,diethanolamine, piperazine and the like. It should be understood thatthe compounds described herein also include the quaternization of anybasic nitrogen-containing groups they contain. In some embodiments,water or oil-soluble or dispersible products are obtained by suchquaternization. The compounds described herein can be prepared aspharmaceutically acceptable salts formed when an acidic proton presentin the parent compound either is replaced by a metal ion, for example analkali metal ion, an alkaline earth ion, or an aluminum ion; orcoordinates with an organic base. Base addition salts are be prepared byreacting the free acid form of the compounds described herein with apharmaceutically acceptable inorganic or organic base, including, butnot limited to organic bases such as ethanolamine, diethanolamine,triethanolamine, tromethamine, N-methylglucamine, and the like andinorganic bases such as aluminum hydroxide, calcium hydroxide, potassiumhydroxide, sodium carbonate, sodium hydroxide, and the like. Inaddition, the salt forms of the disclosed compounds can be preparedusing salts of the starting materials or intermediates.

In some embodiments, the pharmaceutical compositions described hereincontain the active ingredient in a form suitable for oral use, forexample, as tablets, troches, lozenges, aqueous or oily suspensions,dispersible powders or granules, emulsions, hard or soft capsules, orsyrups or elixirs. Compositions intended for oral use are optionallyprepared according to known method, and such compositions may containone or more agents selected from the group consisting of sweeteningagents, flavoring agents, coloring agents and preserving agents in orderto provide pharmaceutically elegant and palatable preparations. Tabletscontain the active ingredient in admixture with non-toxicpharmaceutically acceptable excipients which are suitable for themanufacture of tablets. These excipients may be, for example, inertdiluents, such as calcium carbonate, sodium carbonate, lactose, calciumphosphate or sodium phosphate; granulating and disintegrating agents,such as microcrystalline cellulose, sodium crosscarmellose, corn starch,or alginic acid; binding agents, for example starch, gelatin,polyvinyl-pyrrolidone or acacia, and lubricating agents, for example,magnesium stearate, stearic acid or talc. The tablets may be un-coatedor coated by known techniques to mask the taste of the drug or delaydisintegration and absorption in the gastrointestinal tract and therebyprovide a sustained action over a longer period. For example, a watersoluble taste masking material such as hydroxypropylmethyl-cellulose orhydroxypropylcellulose, or a time delay material such as ethylcellulose, or cellulose acetate butyrate may be employed as appropriate.Formulations for oral use may also be presented as hard gelatin capsuleswherein the active ingredient is mixed with an inert solid diluent, forexample, calcium carbonate, calcium phosphate or kaolin, or as softgelatin capsules wherein the active ingredient is mixed with watersoluble carrier such as polyethyleneglycol or an oil medium, for examplepeanut oil, liquid paraffin, or olive oil.

Aqueous suspensions contain the active material in admixture withexcipients suitable for the manufacture of aqueous suspensions. Suchexcipients are suspending agents, for example sodiumcarboxymethylcellulose, methylcellulose, hydroxypropylmethyl-cellulose,sodium alginate, polyvinyl-pyrrolidone, gum tragacanth and gum acacia;dispersing or wetting agents may be a naturally-occurring phosphatide,for example lecithin, or condensation products of an alkylene oxide withfatty acids, for example polyoxyethylene stearate, or condensationproducts of ethylene oxide with long chain aliphatic alcohols, forexample heptadecaethylene-oxycetanol, or condensation products ofethylene oxide with partial esters derived from fatty acids and ahexitol such as polyoxyethylene sorbitol monooleate, or condensationproducts of ethylene oxide with partial esters derived from fatty acidsand hexitol anhydrides, for example polyethylene sorbitan monooleate.The aqueous suspensions may also contain one or more preservatives, forexample ethyl, or n-propyl p-hydroxybenzoate, one or more coloringagents, one or more flavoring agents, and one or more sweetening agents,such as sucrose, saccharin or aspartame.

Suitable pharmaceutical carriers include inert diluents or fillers,water and various organic solvents. In some embodiments, thepharmaceutical composition contains additional ingredients such asflavorings, binders, excipients and the like. Thus for oraladministration, tablets containing various excipients, such as citricacid are employed together with various disintegrants such as starch,alginic acid and certain complex silicates and with binding agents suchas sucrose, gelatin and acacia. Additionally, lubricating agents such asmagnesium stearate, sodium lauryl sulfate and talc are often useful fortableting purposes. In other embodiments, solid compositions of asimilar type are employed in soft and hard filled gelatin capsules.Preferred materials, therefore, include lactose or milk sugar and highmolecular weight polyethylene glycols. In certain embodiments whereaqueous suspensions or elixirs are desired for oral administration, theactive compound therein is combined with various sweetening or flavoringagents, coloring matters or dyes and, if desired, emulsifying agents orsuspending agents, together with diluents such as water, ethanol,propylene glycol, glycerin, or combinations thereof.

In some embodiments, oily suspensions are formulated by suspending theactive ingredient in a vegetable oil, for example arachis oil, oliveoil, sesame oil or coconut oil, or in mineral oil such as liquidparaffin. In certain embodiments, the oily suspensions contain athickening agent, for example beeswax, hard paraffin or cetyl alcohol.In further or additional embodiments, sweetening agents such as thoseset forth above, and flavoring agents are added to provide a palatableoral preparation. In other embodiments, these compositions are preservedby the addition of an anti-oxidant such as butylated hydroxyanisol oralpha-tocopherol.

Dispersible powders and granules suitable for preparation of an aqueoussuspension by the addition of water provide the active ingredient inadmixture with a dispersing or wetting agent, suspending agent and oneor more preservatives. Suitable dispersing or wetting agents andsuspending agents are exemplified by those already mentioned above. Insome embodiments, additional excipients, for example sweetening,flavoring and coloring agents, are also present. In further oradditional embodiments, these compositions are preserved by the additionof an anti-oxidant such as ascorbic acid.

In some embodiments, pharmaceutical compositions are in the form ofoil-in-water emulsions. In some embodiments, the oily phase is avegetable oil, for example olive oil or arachis oil, or a mineral oil,for example liquid paraffin or mixtures of these. Suitable emulsifyingagents include but are not limited to naturally-occurring phosphatides,for example soy bean lecithin, and esters or partial esters derived fromfatty acids and hexitol anhydrides, for example sorbitan monooleate, andcondensation products of the said partial esters with ethylene oxide,for example polyoxyethylene sorbitan monooleate. In further oradditional embodiments, the emulsions contain sweetening agents,flavoring agents, preservatives and antioxidants.

In some embodiments, pharmaceutical compositions described herein are inthe form of a sterile injectable aqueous solution. Acceptable vehiclesand solvents that are employed include but are not limited to water,Ringer's solution, phosphate buffered saline solution, U.S.P. andisotonic sodium chloride solution, ethanol, and 1,3-butanediol.

In addition, sterile, fixed oils are optionally employed as a solvent orsuspending medium. For this purpose any bland fixed oil is optionallyemployed including synthetic mono- or diglycerides. Suitable lipophilicsolvents or vehicles include fatty oils such as sesame oil, or syntheticfatty acid esters, such as ethyl oleate or triglycerides, or liposomesor other microparticulate systems may be used to target the agent toblood components or one or more organs. In some embodiments, the sterileinjectable preparation is a sterile injectable oil-in-watermicroemulsion where the active ingredient is dissolved in the oilyphase. In certain embodiments, the active ingredient is first dissolvedin a mixture of soybean oil and lecithin. The oil solution thenintroduced into a water and glycerol mixture and processed to form amicroemulsion. In further or additional embodiments, the injectablesolutions or microemulsions are introduced into an individual'sblood-stream by local bolus injection. Alternatively, in someembodiments, it is advantageous to administer the solution ormicroemulsion in such a way as to maintain a constant circulatingconcentration of the instant compound. In order to maintain such aconstant concentration, a continuous intravenous delivery device areutilized. An example of such a device is the Deltec CADD-PLUS™ model5400 intravenous pump.

In other embodiments, the pharmaceutical composition is in the form of asterile injectable aqueous or oleagenous suspension for intramuscularand subcutaneous administration. In further or additional embodiments,this suspension is formulated using those suitable dispersing or wettingagents and suspending agents which have been mentioned above. In someembodiments, the sterile injectable preparation is a sterile injectablesolution or suspension in a non-toxic parenterally-acceptable diluent orsolvent, for example as a solution in 1,3-butanediol. In addition,sterile, fixed oils are conventionally employed as a solvent orsuspending medium. For this purpose in some embodiments, any bland fixedoil is optionally employed including synthetic mono- or diglycerides. Inaddition, fatty acids such as oleic acid find use in the preparation ofinjectables.

In certain embodiments, pharmaceutical compositions are administered inthe form of suppositories for rectal administration of the drug. Thesecompositions are prepared by mixing the active ingredient with asuitable non-irritating excipient which is solid at ordinarytemperatures but liquid at the rectal temperature and will thereforemelt in the rectum to release the drug. Such materials include cocoabutter, glycerinated gelatin, hydrogenated vegetable oils, mixtures ofpolyethylene glycols of various molecular weights and fatty acid estersof polyethylene glycol.

In some embodiments, the compounds or compositions described herein aredelivered in a vesicle, such as a liposome. In further or alternativeembodiments, the compounds and pharmaceutical compositions describedherein are delivered in a controlled release system, or a controlledrelease system can be placed in proximity of the therapeutic target. Inone embodiment, a pump is used.

For topical use, creams, ointments, jellies, solutions or suspensions,etc., containing a compound of Formula I, II, III, or IV is used. Asused herein, topical application includes mouth washes and gargles.

In certain embodiments, pharmaceutical compositions are administered inintranasal form via topical use of suitable intranasal vehicles anddelivery devices, or via transdermal routes, using transdermal skinpatches. To be administered in the form of a transdermal deliverysystem, the dosage administration will be continuous rather thanintermittent throughout the dosage regimen.

In some embodiments, the pharmaceutical composition described hereinfurther comprises a cyclodextrin. In some embodiments, the cyclodextrinhas a concentration (w/v) ranging from about 0.001% to about 50%. Inother embodiments, the cyclodextrin has a concentration (w/v) rangingfrom about 2% to about 48%. In other embodiments, the cyclodextrin has aconcentration (w/v) ranging from about 4% to about 45%. In otherembodiments, the cyclodextrin has a concentration (w/v) ranging fromabout 10% to about 43%. In other embodiments, the cyclodextrin has aconcentration (w/v) ranging from about 15% to about 40%. In otherembodiments, the cyclodextrin has a concentration (w/v) ranging fromabout 20% to about 38%. In other embodiments, the cyclodextrin has aconcentration (w/v) ranging from about 22% to about 37%. In otherembodiments, the cyclodextrin has a concentration (w/v) ranging fromabout 25% to about 35%. In a preferred embodiment, the cyclodextrin hasa concentration (w/v) ranging from about 28% to about 32%.

Some embodiments described herein provide a composition furthercomprising cyclodextrin, wherein the cyclodextrin has a concentration(w/v) of about 15%, 18%, 20%, 22%, 25%, 26%, 27%, 28%, 29%, 30%, 31%,32%, 33%, 34%, 35%, 36%, 37%, or 38% when cyclodextrin derivative isSBE7-β-CD (Captisol®). In one embodiment, the cyclodextrin has aconcentration (w/v) of about 30% when cyclodextrin derivative isSBE7-β-CD (Captisol®). In another embodiment, the solubility enhancerhas a concentration (w/v) of about 29.4% when the cyclodextrinderivative is SBE7-β-CD (Captisol®).

Additional cyclodextrin derivatives suitable for use in intravenouscompositions described herein are known in the art and are described in,e.g., U.S. Pat. Nos. 5,134,127 and 5,376,645 each of which isincorporated by reference herein for such disclosure. In addition,examples of suitable cyclodextrin derivatives are described below.

Suitable cyclodextrins and derivatives useful in certain embodiments ofthe compositions, methods and kits described herein include, forexample, those described in Challa et al., AAPS PharmSciTech 6(2):E329-E357 (2005), U.S. Pat. Nos. 5,134,127, 5,376,645, 5,874,418, eachof which is incorporated by reference herein for such disclosure. Insome embodiments, suitable cyclodextrins or cyclodextrin derivatives foruse in certain embodiments of the compositions, methods and kitsdescribed herein include, but are not limited to, α-cyclodextrins,β-cyclodextrins, γ-cyclodextrins, SAE-CD derivates (e.g. SBE-α-CD,SBE-β-CD SBE1-β-CD, SBE4-β-CD, SBE7-β-CD (Capitzol®) amd SBE-γ-CD)(Cydex, Inc. Lenexa, Kans.), hydroxyethyl, hydroxypropyl (including 2-and 3-hydroxypropyl) and dihydroxypropyl ethers, their correspondingmixed ethers and further mixed ethers with methyl or ethyl groups, suchas methylhydroxyethyl, ethyl-hydroxyethyl and ethyl-hydroxypropyl ethersof α-, β- and γ-cyclodextrin; and the maltosyl, glucosyl andmaltotriosyl derivatives of α-, β- and γ-cyclodextrin, which may containone or more sugar residues, e. g. glucosyl or diglucosyl, maltosyl ordimaltosyl, as well as various mixtures thereof, e. g. a mixture ofmaltosyl and dimaltosyl derivatives. Specific cyclodextrin derivativesfor use herein include hydroxypropyl-β-cyclodextrin,hydroxyethyl-β-cyclodextrin, hydroxypropyl-γ-cyclodextrin,hydroxyethyl-γ-cyclodextrin, dihydroxypropyl-β-cyclodextrin,glucosyl-α-cyclodextrin, glucosyl-β-cyclodextrin,diglucosyl-β-cyclodextrin, maltosyl-α-cyclodextrin,maltosyl-β-cyclodextrin, maltosyl-γ-cyclodextrin,maltotriosyl-β-cyclodextrin, maltotriosyl-γ-cyclodextrin,dimaltosyl-β-cyclodextrin, diethyl-β-cyclodextrin,glucosyl-α-cyclodextrin, glucosyl-β-cyclodextrin,diglucosyl-β-cyclodextrin, tri-O-methyl-β-cyclodextrin,tri-O-ethyl-β-cyclodextrin, tri-O-butyryl-β-cyclodextrin,tri-O-valeryl-β-cyclodextrin, and di-O-hexanoyl-β-cyclodextrin, as wellas methyl-β-cyclodextrin, and mixtures thereof such asmaltosyl-β-cyclodextrin/dimaltosyl-β-cyclodextrin. Any suitableprocedure may be utilized for preparing such cyclodextrins including,e.g., those procedures described in U.S. Pat. No. 5,024,998, which isincorporated by reference herein for such disclosure. Othercyclodextrins suitable for use in certain embodiments of thecompositions, methods and kits described herein include the carboxyalkylthioether derivatives such as ORG 26054 and ORG 25969 by ORGANON(AKZO-NOBEL), hydroxybutenyl ether derivatives by EASTMAN,sulfoalkyl-hydroxyalkyl ether derivatives, sulfoalkyl-alkyl etherderivatives, and other derivatives, for example as described in U.S.Patent Application Nos. 2002/0128468, 2004/0106575, 2004/0109888, and2004/0063663, or U.S. Pat. Nos. 6,610,671, 6,479,467, 6,660,804, or6,509,323, each of which is specifically incorporated by referenceherein for such disclosure.

Hydroxypropyl-β-cyclodextrin can be obtained from Research DiagnosticsInc. (Flanders, N.J.). Exemplary hydroxypropyl-β-cyclodextrin productsinclude Encapsin® (degree of substitution ˜4) and Molecusol® (degree ofsubstitution ˜8); however, embodiments including other degrees ofsubstitution are also available and are within the scope of the presentinvention.

Dimethyl cyclodextrins are available from FLUKA Chemie (Buchs, CH) orWacker (Iowa). Other derivatized cyclodextrins suitable for use in theinvention include water soluble derivatized cyclodextrins. Exemplarywater-soluble derivatized cyclodextrins include carboxylatedderivatives; sulfated derivatives; alkylated derivatives;hydroxyalkylated derivatives; methylated derivatives; andcarboxy-β-cyclodextrins, e. g., succinyl-β-cyclodextrin (SCD). All ofthese materials can be made according to methods known in the art and/orare available commercially. Suitable derivatized cyclodextrins aredisclosed in Modified Cyclodextrins: Scaffolds and Templates forSupramolecular Chemistry (Eds. Christopher J. Easton, Stephen F.Lincoln, Imperial College Press, London, UK, 1999) and New Trends inCyclodextrins and Derivatives (Ed. Dominique Duchene, Editions de Sante,Paris, France, 1991).

Dosing

An isoflavonoid derivative described herein (e.g., a compound of FormulaI, II, III, or IV) is optionally used in the preparation of medicamentsfor treating any of the diseases or conditions described herein in anindividual in need of such treatment, and involves administration ofpharmaceutical compositions containing at least one compound of FormulaI, II, III, or IV or a pharmaceutically acceptable salt, intherapeutically effective amounts to said individual.

In the case wherein the patient's condition does not improve, upon thedoctor's discretion the administration of the isoflavonoid derivative(e.g., a compound of Formula I, II, III, or IV) is optionally continuedchronically and/or at a higher dose, to ameliorate or otherwise controlor limit the cancer.

In the case wherein the patient's status does improve, upon the doctor'sdiscretion the administration of the isoflavonoid derivative (e.g., acompound of Formula I, II, III, or IV) is optionally given continuously;alternatively, the dose of drug being administered is temporarilyreduced or temporarily suspended for a certain length of time (i.e., a“drug holiday”). The length of the drug holiday optionally variesbetween 2 days and 1 year, including by way of example only, 2 days, 3days, 4 days, 5 days, 6 days, 7 days, 10 days, 12 days, 15 days, 20days, 28 days, 35 days, 50 days, 70 days, 100 days, 120 days, 150 days,180 days, 200 days, 250 days, 280 days, 300 days, 320 days, 350 days, or365 days. The dose reduction during a drug holiday includes from10%-100%, including, by way of example only, 10%, 15%, 20%, 25%, 30%,35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or100%.

In some embodiments, when improvement of the patient's conditions hasoccurred, a maintenance dose is administered if necessary. Subsequently,the dosage or the frequency of administration, or both, is reduced, as afunction of the cancer progression, to a level at which the improvedcondition is retained. In some embodiments, patients requireintermittent treatment on a long-term basis upon any recurrence ofsymptoms and/or recurrence.

In some embodiments, the pharmaceutical compositions described hereinare in unit dosage forms suitable for single administration of precisedosages. In unit dosage form, the formulation is divided into unit dosescontaining appropriate quantities of one or more compound of Formula I,II, III, or IV. In some embodiments, the unit dosage is in the form of apackage containing discrete quantities of the formulation. Non-limitingexamples are packaged tablets or capsules, and powders in vials orampoules. In some embodiments, aqueous suspension compositions arepackaged in single-dose non-reclosable containers. Alternatively,multiple-dose reclosable containers are used, in which case it istypical to include a preservative in the composition. By way of exampleonly, formulations for parenteral injection are presented in unit dosageform, which include, but are not limited to ampoules, or in multi dosecontainers, with an added preservative.

The daily dosages appropriate for the compounds are from about 0.1 mg toabout 3000 mg, conveniently administered in divided doses, including,but not limited to, up to four times a day or in extended release form.Suitable unit dosage forms for oral administration include from about0.1 to 1000 mg active ingredient, from about 0.1 to 500 mg activeingredient, from about 1 to 250 mg of active ingredient, from about 1 toabout 100 mg active ingredient, from about 1 to about 75 mg activeingredient, from about 1 to about 50 mg active ingredient, from about 1to about 30 mg active ingredient, from about 1 to about 20 mg activeingredient, or from about 1 to about 10 mg active ingredient. Suchdosages are optionally altered depending on a number of variables, notlimited to the activity of the compound used, the mode ofadministration, the requirements of an individual, the severity of thedisease or condition being treated, and the judgment of thepractitioner.

EXAMPLES Example 1. Synthesis and Evaluation of Compound 31 (Scheme 3)

Compound 35. Hydrogenation of daidzein in ethanol and 1M potassiumhydroxide solution with 10% Palladium on alumina catalyst and a hydrogenpressure of 0.5 bar in a stainless steel reactor. After the completionof the hydrogenation process the material was filtered and charged intoa glass lined mild steel reactor where the pH was adjusted to 6.96 with1M acetic acid. The resulting slurry was diluted further with water andthen filtered to provide compound 35. The product was dried in vacuumoven at 60° C.

Compound 36. Compound 35 was protected as thebis-tert-butyldimethlysiloxy adduct by charging a glass lined mild steelreactor with compound 35, imidazole, N,N-dimethylformamide withagitation for 30 minutes. Tert-butyldimethylsilyl chloride was thenadded to the solution. At the completion of the process the material wastransferred into a glass lined mild steel reactor containing water. Theresulting slurry was filtered on a Nutche filter. The product was driedunder vacuum at 50° C.

Compound 37. The Grignard reaction was completed by charging a stainlesssteel reactor with magnesium, THF, initiating a reaction with1,2-dibromoethane, then adding 4-bromoanisole dissolved in THF. Asolution of compound 36 in THF was then added over a period of 45minutes maintaining a temperature <35° C. At the completion of thereaction excess magnesium was filtered off and the mixture was quenchedwith an ammonium chloride solution. After separating the phases, theorganic layer was evaporated to a minimum volume, in vacuo. Theresultant material was dissolved in ethanol and heated to reflux untilconversion was complete. The mixture was then cooled to 0° C., and theproduct was collected by filtration. The product was dried under astream of nitrogen.

Compound 38. The hydrogenation of the alkene moiety was effected bycharging a stainless steel reactor with THF, 10% palladium on aluminacatalyst and compound 37. The mixture was stirred under hydrogen atatmospheric pressure, until complete conversion was effected. Themixture was filtered and carried directly to the next step

Compound 39. The deprotection was effected by transferring compound 38in THF into a stainless steel reactor. Potassium fluoride was dissolvedin water and added into the reactor. The mixture was heated at refluxuntil conversion was complete. The THF was distilled off, and theaqueous layer was extracted twice with ethyl acetate. The organicextracts were combined, and washed twice with calcium chloride (35% aqsolution). The organic layer was washed four times with water, and thesolvent was reduced in vacuo. Ethanol was added and the solution wascooled to effect crystallization. The resulting solid was collected viafiltration. The product was dried under a stream of 85% humiditynitrogen.

Compound 32. Compound 39 was dissolved in refluxing chloroform, andadded to a 1 M solution of boron tribromide in chloroform, in aglass-lined reactor. The reaction was stirred until complete, and thenquenched with water. The pH of the mixture was adjusted to ≥12 with 3 NNaOH, and the organic layer was removed. Ethyl acetate was added to theaqueous solution, the pH was adjusted to 5.5-6.5 with 2N HCl, and theaqueous phase was removed. The organic solution was washed with water,then saturated brine, dried over sodium sulfate, and concentrated invacuo. The residue was dissolved in isopropanol and concentrated invacuo. The material was recrystallized from isopropanol and heptanes.The product was dried under vacuum at 50° C.

Compound 31. The chiral separation was performed via supercritical fluidchromatography (SFC), using a Thar SFC-350 System, and a Chiralpak AS-Hcolumn. Compound 32 was dissolved in a mixture of isopropanol andethanol, applied to the column in portions via a stacked injectionsequence, and eluted with a mixture of isopropanol, ethanol andsupercritical CO₂. The eluent containing Compound 31 was collected andconcentrated in vacuo. The residue was dissolved in ethanol andconcentrated in vacuo, three times to replace residual isopropanol withethanol. The product was milled and dried under vacuum with nitrogenpurge at 60° C. The d-enantiomer of compound 31 was provided in >95%purity. The optical rotation of compound 31 was measured to be +24° at27° C. (c=1 in ethanol) @ 99% enantiomeric excess.

Example 2. Compounds

Any compound described herein may be synthesized according to theexemplary syntheses shown in Schemes 1, 2, or 3. ¹H NMR data areprovided for the following non-limiting compounds.

Compound 3. ¹H NMR (400 MHz, d₆-DMSO) δ 9.32 (s, 1H); 9.19 (s, 1H); 6.82(m, 1H); 6.65 (m, 1H); 6.56-6.50 (m, 4H); 6.41 (m, 1H); 6.36 (m, 1H);6.31 (m, 1H), 6.28 (m, 1H); 4.23 (m, 1H); 4.17 (m, 1H); 4.12 (m, 1H);3.43 (m, 1H); 2.01 (s, 3H).

Compound 4. ¹H NMR (400 MHz, d₆-DMSO) δ 9.32 (s, 1H); 9.19 (s, 1H); 6.87(m, 1H); 6.65 (m, 1H); 6.60-6.52 (m, 4H); 6.35 (m, 1H), 6.30 (m, 1H);6.28 (m, 1H); 6.24 (m, 1H); 4.23 (m, 1H); 4.18 (m, 1H); 4.14 (m, 1H),3.73 (s, 3H) 3.43 (m, 1H).

Compound 5. ¹H NMR (400 MHz, d₆-Acetone) δ 8.24 (s, 1H); 8.16 (s, 1H);8.10 (s, 1H); 6.62 (m, 2H); 6.58 (m, 2H); 6.54 (m, 3H); 6.44 (m, 2H),6.39 (m, 1H); 4.38 (m, 1H); 4.20 (m, 1H); 4.14 (m, 1H); 3.42 (m, 1H);2.13 (s, 3H).

Compound 6. ¹NMR (400 MHz, d₆-Acetone) δ 8.23 (s, 1H); 8.09 (s, 1H);7.99 (s, 1H); 6.63 (m, 2H); 6.57 (m, 2H); 6.54 (m, 2H); 6.51 (m, 1H),6.38 (m, 1H); 6.33 (m, 1H); 4.38 (m, 1H); 4.20 (m, 1H); 4.11 (m, 1H);3.40 (m, 1H); 2.13 (s, 3H), 1.98 (s, 3H).

Compound 7. ¹H NMR (400 MHz, d₆-Acetone) δ 8.10 (m, 2H); 6.63 (m, 2H);6.61 (m, 1H); 6.57 (m, 2H); 6.54 (m, 1H); 6.41 (m, 1H), 6.38 (m, 1H);6.36 (m, 1H); 4.38 (m, 1H); 4.21 (m, 1H); 4.14 (m, 1H); 3.73 (s, 3H);3.42 (m, 1H); 2.14 (s, 3H), 1.95 (s, 3H).

Compound 8. ¹H NMR (400 MHz, d₆-DMSO) δ 6.65 (m, 1H); 6.58 (m, 2H); 6.47(m, 2H); 6.34 (m, 1H); 6.17 (s, 2H); 4.58 (s, 1H); 4.53 (s, 1H), 4.33(m, 1H); 4.20 (m, 1H); 4.07 (m, 1H); 3.62 (s, 3H); 3.44 (m, 1H); 2.18(s, 3H); 2.05 (s, 6H).

Compound 9. ¹H NMR (400 MHz, d₆-CDCl₃) δ 6.69 (s, 1H); 6.23 (m, 3H);6.51 (m, 2H); 6.39-6.34 (m, 3H); 4.62 (s, 1H); 4.59 (s, 1H), 4.34 (m,1H); 4.25 (m, 1H); 4.16 (m, 1H); 3.49 (m, 1H); 2.19 (s, 3H); 2.06 (s,3H).

Compound 10. ¹H NMR (400 MHz, d₆-DMSO) δ 9.17 (s, 1H); 6.88 (m, 1H);6.56-6.50 (m, 4H); 6.49 (m, 1H); 6.34 (m, 2H); 6.24 (m, 1H), 6.26 (m,1H); 4.22 (m, 1H); 4.18 (m, 1H); 3.04 (s, 3H); 3.42 (m, 1H); 2.04 (s,3H).

Compound 32. ¹H NMR (400 MHz, d₆-Acetone) δ 8.33 (s, 1H); 8.26 (s, 1H);8.19 (s, 1H); 6.71 (m, 1H); 6.63 (m, 2H); 6.58 (m, 2H); 6.55 (m, 2H);6.45 (m, 2H), 6.39 (m, 1H); 6.35 (m, 1H); 4.34 (m, 1H); 4.14 (m, 1H);4.12 (m, 1H); 3.42 (m, 1H).

Example 3: In Vitro Study of Anti-proliferative Activity Against CancerCells

Tissue culture. The multidrug resistant primary epithelial ovariancancer cell line R-182 TARA was a gift from Dr. Gil Mor (YaleUniversity, New Haven, Conn., USA). This cell line was derived byexplant from ovarian tumors and cultured as previously described. Allother cell lines were purchased from American Type Culture Collection(ATCC, Manassas, Va., USA) with the exception of MKN1, HuH-7, JHH-1,which were purchased from the Japanese Collection of ResearchBioresources (JCRB, Osaka, Japan), and OE19 which was purchased from theEuropean Collection of Cell Cultures (ECACC, Salisbury, UK).

The human non-small cell lung adenocarcinoma lines NCI-H1299 (CRL-5803),NCI-H460 (HTB-177), NCI-H358 (CRL-5807), NCI-H838 (CRL-5844), the humancolorectal adenocarcinoma lines COLO 205 (CCL-222), HCT-15 (CCL-225) andthe human gastric cancer cell line NCI-N87 (CRL-5822) were cultured inRPMI 1640 medium containing 2 g/L sodium bicarbonate(Hyclone/Invitrogen) supplemented with 2 mM L-glutamine (Gibco) 1 mMsodium pyruvate (Sigma), 10 mM HEPES (Sigma) and 4500 mg/L glucose(Sigma). The human non-small cell lung adenocarcinoma line NCI-H2126(CCL-256) was cultured in DMEM:F12(1:1) (Hyclone/Invitrogen) containing2.5 mM L-glutamine 2.4 g/L sodium bicarbonate supplemented with 5% fetalbovine serum (FBS), an additional 2 mM L-glutamine, 15 mM HEPES, 0.005mg/m1 insulin (Sigma), 0.01 mg/ml transferrin (Sigma), 30 nM sodiumselenite (Sigma), 10 nM hydrocortisone (Sigma) and 10 nM beta-estradiol(Sigma). The human colorectal adenocarcinoma line HT-29 (HTB-38) and thehuman gastric cancer cell lines OE-19 (#96071721) and MKN1 (JCRB0252)were cultured in RPMI 1640 media supplemented with 2 mM L-glutamine.

The human colorectal adenocarcinoma line HCT-116 (CCL-247) and the humanbreast adenocarcinoma line SK-BR-3 (HTB-30) were cultured in McCoy's 5aMedium (Invitrogen) containing 1.5 mM L-glutamine and 2.2 g/L sodiumbicarbonate. The human colorectal adenocarcinoma line SW620 (CCL-227)was cultured in Leibovitz's L-15 Medium (Invitrogen) containing 2.05 mML-glutamine.

The human hepatocellular carcinoma lines HepG2 (HB-8065), SK-HEP-1(HTB-52) and the normal human lung fibroblast line IMR-90 (CCL-186) werecultured in Minimum Essential Eagles Medium containing 2 mM L-glutamine,2.2 g/L sodium bicarbonate, supplemented with 1 mM sodium pyruvate and0.1 mM non-essential amino acids. The human hepatocellular carcinomaline JHH-1 (JCRB1062) was cultured in Williams E Medium (Invitrogen)containing 2.2 g/L sodium bicarbonate, supplemented with 2 mML-glutamine. The hepatocellular carcinoma line HuH-7 (JCRB0403) wascultured in DMEM, supplemented with 2 mM L-glutamine.

The human gastric cancer cell line AGS (CRL-1739) was cultured in HamsF-12K (Kaighans modification) medium containing 2 mM L-glutamine, 2.5g/L sodium bicarbonate and 2 mM sodium pyruvate. The human breastadenocarcinoma line MDA-MB-468 (HTB-132) was cultured in DMEM:F12 (1:1)medium containing 2.5 mM L-glutamine, 2.4 g/L sodium bicarbonate,supplemented with an additional 2 mM L-glutamine.

All cultures were supplemented with 10% FBS (unless stated otherwise),penicillin (100 U/ml) and streptomycin (100 μ/ml) and cultured at 37° C.in a humidified atmosphere of 5% CO2, with the exception of SW-620 whichwas cultured at 37° C. in standard humidified atmosphere.

Proliferation Assays. IC₅₀ values were determined for each cell line.Cells were seeded in 96-well plates at an appropriate cell density asdetermined from growth kinetics analysis and cultured for 5 days in theabsence and presence of the test compounds. Cell proliferation wasassessed after the addition of 20 μl of 3-4,5dimethylthiazol-2,5-diphenyl tetrazolium bromide (MTT, 5 mg/ml in PBS,Sigma) for 5 hrs at 37° C. according to manufacturer's instructions.IC₅₀ values were calculated from semi-log plots of % of controlproliferation on the y-axis against log dose on the x-axis.

Anti-proliferative Activity of Isoflavonoid Derivatives. IC₅₀ valueswere determined for each cell line after 120 h of exposure.

TABLE 1 Compound Indication Cell Line 31 5 d-5 l-5 7 d-7 l-7 6 d-6 l-6Prostate PC3 B B A E D C E B B E Prostate DU145 B B A E D C E B B EProstate LNCaP B B A E D D E C B E CRC COLO205 D D C E E E E D D EOvarian A2780 B B A E D C E B B E Ovarian R-182 A B A E D C E B A EOvarian CP70 C A A E D C E C B E NSCLC NCI-H460 C B A E D D E B B ENSCLC A549 C B B E D D E C B E NSCLC CALU3 B A A E D D E B B E LiverHepG2 B A A E D C E B A E Liver SK-Hep-1 B B A E D D E B A E Liver HuH-7B B A E D C E B B E Melanoma A2058 A A A E D C E B A E Melanoma 4405 B BA E D D E B B E Melanoma MM200 C B B E E — — C — E Breast MDA-MB- A B AE D B E B A E 468 Breast SKBR-3 A A A E C — — A — D Key: A: IC₅₀ ≤ 0.15μM; B: IC₅₀ = 0.15-0.50 μM; C: IC₅₀ = 0.51-1.5 μM; D: IC₅₀ = 1.6-10 μM;E: IC₅₀ ≥ 10 μM

Example 4: In Vitro Study of Anti-proliferative Activity of Compound 31

Compound 31, the d-isomer, exhibited superior anti-proliferativeactivity against various cancer cells over 120 hrs of exposure whencompared with both the racemic (compound 32) and l-forms (compound 33).Activity data is provided is Table 2.

TABLE 2 Compound Indication Cell Line 32 31 33 Prostate PC3 C B —Ovarian A2780 C B E Ovarian CP70 C B E Melanoma A2058 B A — MelanomaMM2200 C C E Breast MDA-MB-468 C A — Breast SKBR-3 C A E Key: A: IC₅₀ ≤0.15 μM; B: IC₅₀ 0.15-0.50 μM; C: IC₅₀ = 0.51-1.5 μM; D: IC₅₀ = 1.6-10μM; E: IC₅₀ ≥ 10 μM

Example 5: In Vitro Assessment of Combination Compound 31 and CancerTherapy

In vitro toxicity in normal and cancer cells. Cells were seeded in96-well plates at an appropriate cell density as determined from growthkinetics analysis. Depending on the plating efficiency and lag phase ofindividual cell lines, cells were allowed to plate down prior to drugexposure. Intra-experimental single agent controls were included toensure IC₅₀ values obtained for each cell line matched previous IC₅₀determinations. Four analogue concentrations were employed in eachanalysis. Analogue concentrations used in each assay were chosen basedon IC₅₀ values, which formed the top concentration of analogue used.Subsequent concentrations were chosen based on simple ½ or 1/10dilutions of the top analogue concentration employed (i.e. 2, 1, 0.5,0.25 μM). Nine 1/10 serial dilutions of chemotherapeutic were employedwith the top chemotherapeutic concentration being 50 μM.

For combined analysis, analogue concentrations were held constantthrough 1/10 serial dilutions of chemotherapeutic in growth medium (topchemotherapeutic concentration employed was 50 μM). Combined cultureswere cultured for 5 days.

The sequence of administration effect of each agent on chemotherapeuticIC₅₀ values was assessed by exposing plated cells to a single agent insequence for 24 hr. To assess the isoflavonoidderivative→chemotherapeutic sequence, plated cells were first exposed tothe appropriate analogue concentrations and incubated at 37° C. for 24hr. Cells were washed with growth medium and then exposed to theappropriate chemotherapeutic concentrations and incubated for 24 hr.Cells were then washed and incubated for a further 3 days. To assess thechemotherapeutic→isoflavonoid derivative sequence, the procedure wasreversed.

Cell proliferation was assessed after the addition of 20 μl of 3-4,5dimethylthiazol-2,5-diphenyl tetrazolium bromide (MTT, 2.5 mg/ml in PBS,Sigma) for 3-4 hrs at 37° C. according to manufacturer's instructions.IC₅₀ values were calculated from semi-log plots of % of controlproliferation on the y-axis against log dose on the x-axis.

3-D model analysis of the cytotoxic interaction between drug A and drugB enables the representation of predicted inhibitory effect of two drugsin combination in 3 dimensions to reveal actual regions of synergy orantagonism. The 3D synergy plots are based on a theory of “TheoreticalAdditivity” (TA or observed synergy) as outlined by Kanzawa et al.Theoretical Additivity was calculated from the cytotoxicities of drug Aand drug B as monotherapies using the following formula which assumesthe drugs are mutually exclusive inhibitors:

${{TA}_{(1)} = \frac{( f_{a} )_{A} + ( f_{a} )_{B} - {2( f_{a} )_{A}( f_{a} )_{B}}}{1 - {( f_{a} )_{A}( f_{a} )_{B}}}}{{{Where}( f_{a} )A} = {{fraction}{of}{cells}{affected}{by}{drug}A}}{{( f_{b} )B} = {{fraction}{of}{cells}{affected}{by}{drug}B}}$

The TA is calculated for each combination of drug concentrations andsubtracted from the observed experimental effect for each combination togive a measurement of synergistic or enhanced action. A positivedifference indicates that more cells are affected by the drugcombination than would be expected in theory if the two drugs wereadministered together—hence synergism. A negative difference indicatesthat less cells were affected than theoretically expected—henceantagonism.

Combination index (CI) analysis, which employs the median-effectprinciple correlating drug dose to cytotoxicity, was also employed toassess synergy. The median-effect equation is utilized to calculate thedose of a drug that inhibits “x” percent of cells (Chou and Talalay,1984).D=Dm[f _(a)/(1−f _(a))]^(1/m)

Where D is dose of drug, Dm is median effect signifying potency, fa isfraction affected by dose and m is the sigmoidicity of the dose effectcurve.

For two drugs with mutually nonexclusive mechanisms of action (D)1 and(D)2, CI is then calculated as:

${CI} = {\frac{(D)_{1}}{( D_{x} )_{1}} + \frac{(D)_{2}}{( D_{s} )_{2}} + \frac{(D)_{1}(D)_{2}}{(D)_{1}(D)_{2}}}$

In vitro Assessment of Combination of Optically Active Compound 31 andCarboplatin. Combination studies employed both 24 hr concurrentexposure, and 24 hr sequential exposure (racemic compound32→Carboplatin) regimens. In both studies, four analogue concentrations(0.25, 0.5, 1 and 5 μM) were held constant against titrated carboplatin.When 1 and 5 μM of compound 32 was assessed in combination with thelowest concentration of carboplatin employed in this study (0.4 μM), noIC₅₀ for carboplatin was achieved due the high levels of cell killobserved (30-40% of control). The data indicates that inclusion of 0.5μM of compound 32 enhanced the anti-cancer effect of carboplatin by 7-11fold depending on exposure regimen, and ˜1.5-2 fold when 0.25 μM ofcompound 32 was employed.

When the compound 31-carboplatin combination was assessed at 0.5, 1 and5 μM of compound 31 plus the lowest concentration of carboplatinemployed in this study (0.4 μM), no IC₅₀ for carboplatin was achieveddue to high cell kill levels observed at 25-40% of control. The dataindicates that, depending on exposure regimen, inclusion of 0.25 μM ofcompound 31 enhanced the anti-cancer effect of carboplatin by 7-11 fold.

Using the 3D method of Kanzawa, it was found that the combination of 0.5μM of compound 32 and 12.5 μM carboplatin yielded maximal level ofinhibition of cell proliferation compared with respective controls. Thiseffect was observed at concentrations ranging from 1.5-100 μMcarboplatin (depending of the exposure regimen) and at all concentrationof compound 32. In comparison, maximal activity enhancement betweencompound 31 and carboplatin was also observed 12.5 μM carboplatin but ata 2-fold lower dilution of compound 31 (0.25 μM). While theconcentration range where activity enhancement was observed is not aswide as that observed with compound 32 (particularly at higher compound31 concentrations), this is due to the higher potency of compound 31 at1 and 5 μM. The data indicates that compound 31 is superior in itsability to augment carboplatin toxicity against A2780 ovarian cancercells compared with compound 32. It is important to note that compound33 did not impart any activity enhancement or antagonistic effect whenassessed in combination with carboplatin against the A2780 cell line.

Example 6: Relative Potencies of the Compound 31 and Compound 34 toAugment Carboplatin Toxicity in Ovarian Cancer Cells (A2780)

Sequential exposure (24 h) of A2780 cells to 0.25 μM of compound 31followed by carboplatin resulted in superior retardation of A2780 cellproliferation when compared with the compound 34 (0.25 μM). Similarly,exposure of A2780 cells to 0.5 μM of compound 31 in combination withcarboplatin further enhanced the potency of the inhibition ofproliferation and this potency was superior to that observed with 0.5 μMof compound 34. These data demonstrate that the compound 31-carboplatincombination is more efficacious at inhibiting A2780 cancer cellproliferation when compared with the compound 34-carboplatincombinations.

Example 7. Intravenous Composition of Compound 31

Compound 31 is dissolved in an 8% solution of Captisol® in water, at arate of 10 mg/mL, well below its solubility limit of 27.9 mg/mL at 25°C. (20% Captisol®). Formulation is carried out under aseptic conditions.Sterility is achieved by terminal filtration through a 0.22 micronfilter.

Example 8: Intravenous Composition of Compound 5

An exemplary formulation according to the invention is made according tothe following general procedure. SBE7-β-CD is dissolved in water to forma solution containing about 30% w/v of cyclodextrin. Compound 5 is addedto the SBE7-β-CD containing solution until a concentration of about 35mg/mL compound 5 is reached. A formulation evaluated in animal and humanclinical studies and comprising the following components in the amountsindicated is prepared as indicated above. The pH of the solution is notadjusted and no antioxidants or preservatives are included.

Example 9: Intravenous Composition of Compound 6

SBE7-β-CD is dissolved in water to form a solution containing about 30%w/v of SBE7-β-CD. Disodium ethylenediaminetetraacetate is added to theSBE7-β-CD solution at 0.01% w/v and dissolved. Compound 6 is added tothe SBE7-β-CD containing solution with stirring until a concentration ofabout 35 mg/mL compound 6 is reached. The pH is adjusted to 7-8.5 withsodium hydroxide. The solution is purged with nitrogen gas then filteredthrough a 0.22 micron pore size filter prior to administration.

Example 10: Treatment for Breast Cancer

Human Clinical Trial of the Safety and/or Efficacy of Isoflavonoid forBreast Cancer Therapy

Objective: To compare the safety and pharmacokinetics of administeredcomposition comprising compound 5, 6, 7, d-5, d-6, d-7, or 31.

Study Design: This study will be a Phase I, single-center, open-label,randomized dose escalation study followed by a Phase II study in breastcancer patients. Patients should not have had exposure to the compoundprior to the study entry. Patients must not have received treatment fortheir cancer within 2 weeks of beginning the trial. Treatments includethe use of chemotherapy, hematopoietic growth factors, and biologictherapy such as monoclonal antibodies. Patients must have recovered fromall toxicities (to grade 0 or 1) associated with previous treatment. Allsubjects are evaluated for safety and all blood collections forpharmacokinetic analysis are collected as scheduled. All studies areperformed with institutional ethics committee approval and patientconsent.

Phase I: Patients receive i.v. compound 5, 6, 7, d-5, d-6, d-7, or 31 ondays 1, 8, and 15 of each 28-day cycle. Doses of compound 5, 6, 7, d-5,d-6, d-7, or 31 may be held or modified for toxicity based onassessments as outlined below. Treatment repeats every 28 days in theabsence of unacceptable toxicity. Cohorts of 3-6 patients receiveescalating doses of the compound until the maximum tolerated dose (MTD)for the compound is determined. The MTD is defined as the dose precedingthat at which 2 of 3 or 2 of 6 patients experience dose-limitingtoxicity. Dose limiting toxicities are determined according to thedefinitions and standards set by the National Cancer Institute (NCI)Common Terminology for Adverse Events (CTCAE) Version 3.0 (Aug. 9,2006).

Phase II: Patients receive compound 5, 6, 7, d-5, d-6, d-7, or 31 as inphase I at the MTD determined in phase I. Treatment repeats every 4weeks for 2-6 courses in the absence of disease progression orunacceptable toxicity. After completion of 2 courses of study therapy,patients who achieve a complete or partial response may receive anadditional 4 courses. Patients who maintain stable disease for more than2 months after completion of 6 courses of study therapy may receive anadditional 6 courses at the time of disease progression, provided theymeet original eligibility criteria.

Blood Sampling Serial blood is drawn by direct vein puncture before andafter administration of the compound. Venous blood samples (5 mL) fordetermination of serum concentrations are obtained at about 10 minutesprior to dosing and at approximately the following times after dosing:days 1, 8, and 15. Each serum sample is divided into two aliquots. Allserum samples are stored at −20° C. Serum samples are shipped on dryice.

Pharmacokinetics: Patients undergo plasma/serum sample collection forpharmacokinetic evaluation before beginning treatment and at days 1, 8,and 15. Pharmacokinetic parameters are calculated by model independentmethods on a Digital Equipment Corporation VAX 8600 computer systemusing the latest version of the BIOAVL software. The followingpharmacokinetics parameters are determined: peak serum concentration(C_(max)); time to peak serum concentration (t_(max)); area under theconcentration-time curve (AUC) from time zero to the last blood samplingtime (AUC₀₋₇₂) calculated with the use of the linear trapezoidal rule;and terminal elimination half-life (t_(1/2)), computed from theelimination rate constant. The elimination rate constant is estimated bylinear regression of consecutive data points in the terminal linearregion of the log-linear concentration-time plot. The mean, standarddeviation (SD), and coefficient of variation (CV) of the pharmacokineticparameters are calculated for each treatment. The ratio of the parametermeans (preserved formulation/non-preserved formulation) is calculated.

Patient Response to combination therapy: Patient response is assessedvia imaging with X-ray, CT scans, and MRI, and imaging is performedprior to beginning the study and at the end of the first cycle, withadditional imaging performed every four weeks or at the end ofsubsequent cycles. Imaging modalities are chosen based upon the cancertype and feasibility/availability, and the same imaging modality isutilized for similar cancer types as well as throughout each patient'sstudy course. Response rates are determined using the RECIST criteria.(Therasse et al, J. Natl. Cancer Inst. 2000 Feb. 2; 92(3):205-16;http://ctep.cancer.gov/forms/TherasseRECISTJNCI.pdf). Patients alsoundergo cancer/tumor biopsy to assess changes in progenitor cancer cellphenotype and clonogenic growth by flow cytometry, Western blotting, andIHC, and for changes in cytogenetics by FISH. After completion of studytreatment, patients are followed periodically for 4 weeks.

Example 11: Treatment for Ovarian Cancer

Human Clinical Trial of the Safety and/or Efficacy of Isoflavonoid forOvarian Cancer Therapy

Objective: To compare the safety and pharmacokinetics of administeredcomposition comprising compound 5, 6, 7, d-5, d-6, d-7, or 31.

Study Design: This study will be a Phase I, single-center, open-label,randomized dose escalation study followed by a Phase II study in ovariancancer patients. Patients should not have had exposure to the compoundprior to the study entry. Patients must not have received treatment fortheir cancer within 2 weeks of beginning the trial. Treatments includethe use of chemotherapy, hematopoietic growth factors, and biologictherapy such as monoclonal antibodies. Patients must have recovered fromall toxicities (to grade 0 or 1) associated with previous treatment. Allsubjects are evaluated for safety and all blood collections forpharmacokinetic analysis are collected as scheduled. All studies areperformed with institutional ethics committee approval and patientconsent.

Phase I: Patients receive i.v. compound 5, 6, 7, d-5, d-6, d-7, or 31 ondays 1, 8, and 15 of each 28-day cycle. Doses of the compound may beheld or modified for toxicity based on assessments as outlined below.Treatment repeats every 28 days in the absence of unacceptable toxicity.Cohorts of 3-6 patients receive escalating doses of the compound untilthe maximum tolerated dose (MTD) for the compound is determined. The MTDis defined as the dose preceding that at which 2 of 3 or 2 of 6 patientsexperience dose-limiting toxicity. Dose limiting toxicities aredetermined according to the definitions and standards set by theNational Cancer Institute (NCI) Common Terminology for Adverse Events(CTCAE) Version 3.0 (Aug. 9, 2006).

Phase II: Patients receive compound 5, 6, 7, d-5, d-6, d-7, or 31 as inphase I at the MTD determined in phase I. Treatment repeats every 4weeks for 2-6 courses in the absence of disease progression orunacceptable toxicity. After completion of 2 courses of study therapy,patients who achieve a complete or partial response may receive anadditional 4 courses. Patients who maintain stable disease for more than2 months after completion of 6 courses of study therapy may receive anadditional 6 courses at the time of disease progression, provided theymeet original eligibility criteria.

Blood Sampling Serial blood is drawn by direct vein puncture before andafter administration of the compound. Venous blood samples (5 mL) fordetermination of serum concentrations are obtained at about 10 minutesprior to dosing and at approximately the following times after dosing:days 1, 8, and 15. Each serum sample is divided into two aliquots. Allserum samples are stored at −20° C. Serum samples are shipped on dryice.

Pharmacokinetics: Patients undergo plasma/serum sample collection forpharmacokinetic evaluation before beginning treatment and at days 1, 8,and 15. Pharmacokinetic parameters are calculated by model independentmethods on a Digital Equipment Corporation VAX 8600 computer systemusing the latest version of the BIOAVL software. The followingpharmacokinetics parameters are determined: peak serum concentration(C_(max)); time to peak serum concentration (t_(max)); area under theconcentration-time curve (AUC) from time zero to the last blood samplingtime (AUC₀₋₇₂) calculated with the use of the linear trapezoidal rule;and terminal elimination half-life (t_(1/2)), computed from theelimination rate constant. The elimination rate constant is estimated bylinear regression of consecutive data points in the terminal linearregion of the log-linear concentration-time plot. The mean, standarddeviation (SD), and coefficient of variation (CV) of the pharmacokineticparameters are calculated for each treatment. The ratio of the parametermeans (preserved formulation/non-preserved formulation) is calculated.

Patient Response to combination therapy: Patient response is assessedvia imaging with X-ray, CT scans, and MRI, and imaging is performedprior to beginning the study and at the end of the first cycle, withadditional imaging performed every four weeks or at the end ofsubsequent cycles. Imaging modalities are chosen based upon the cancertype and feasibility/availability, and the same imaging modality isutilized for similar cancer types as well as throughout each patient'sstudy course. Response rates are determined using the RECIST criteria.(Therasse et al, J. Natl. Cancer Inst. 2000 Feb 2; 92(3):205-16;http://ctep.cancer.gov/forms/TherasseRECISTJNCI.pdf). Patients alsoundergo cancer/tumor biopsy to assess changes in progenitor cancer cellphenotype and clonogenic growth by flow cytometry, Western blotting, andIHC, and for changes in cytogenetics by FISH. After completion of studytreatment, patients are followed periodically for 4 weeks.

What is claimed is:
 1. A compound that isd-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-olprovided in at least 90% enantiomeric excess, or a pharmaceuticallyacceptable salt thereof.
 2. A kit comprising a compound that isd-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-olprovided in at least 90% enantiomeric excess, or a pharmaceuticallyacceptable salt thereof; and a sealable, plastic infusion bag.
 3. Amethod of treating cancer in an individual in need of cancer therapy,the method comprising administering to the individual a compound that isd-cis-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-8-methylchroman-7-olprovided in at least 90% enantiomeric excess, or a pharmaceuticallyacceptable salt thereof.
 4. The method of claim 3, wherein the compoundincreases or induces sensitivity of the cancer to a chemotherapeuticagent, anti-cancer agent, or radiation therapy.
 5. The method of claim3, wherein the cancer has lost sensitivity to a chemotherapeutic agent,anti-cancer agent, or radiation therapy.
 6. The method of claim 3,wherein the cancer is bladder cancer, breast cancer, colon cancer,recital cancer, endometrial cancer, kidney cancer, leukemia, lungcancer, melanoma, non-Hodgkin lymphoma, ovarian cancer, pancreaticcancer, prostate cancer, thyroid cancer, or cancers of the brain.
 7. Themethod of claim 3, wherein the cancer is human breast cancer or ovariancancer.
 8. The method of claim 3, wherein the method further comprisesadministering an additional anti-cancer agent selected from the groupconsisting of cisplatin, carboplatin, paclitaxel, gemcitabine,doxorubicin, epirubicin, cyclophosphamide, capecitabine, 5-fluorouracil,vinorelbine, trastuzumab, and bevacizumab.